151 results on '"Castro, Ludovic"'
Search Results
2. (C5Me5)2Y(μ-H)(μ-CH2C5Me4)Y(C5Me5) as a reservoir of electrons for the reduction of PhSSPh and CO2: A theoretical study
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Castro, Ludovic and Maron, Laurent
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- 2018
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3. Sekiro : La seconde vie des Souls
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Castro, Ludovic, Castro, Ludovic, Castro, Ludovic, and Castro, Ludovic
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Voici une étude complète de Sekiro : sa création, les systèmes de jeu mobilisés, son univers, ses personnages et même sa musique. L'auteur en décrypte les thématiques et n'oublie pas de passer en revue les notions issues de la culture, de l'histoire et des religions japonaises, auxquels le jeu fait appel.Peu de séries de jeux vidéo peuvent se targuer d’avoir autant marqué les années 2010 que celle des Souls. Ce succès épatant et inattendu, le studio FromSoftware le doit principalement au talent du désormais célèbre Hidetaka Miyazaki, dont la vision radicale du jeu vidéo a su rapidement charmer et convaincre. En mai 2014, le réalisateur a été promu président de FromSoftware. Alors qu’il aurait pu continuer à concevoir des Souls ad vitam æternam, il a préféré favoriser le développement de nouvelles franchises. Le premier véritable représentant de cette nouvelle ère est Sekiro : Shadows Die Twice, un jeu d’une richesse inouïe à la cohérence thématique irréprochable. Cet ouvrage revient dans un premier temps sur les coulisses du développement et s’efforce, par le biais d’une comparaison systématique avec la série des Souls, d’examiner l’évolution de la philosophie ludique de FromSoftware. S’ensuivent une analyse détaillée de l’univers, du scénario et des personnages ainsi qu’une étude des influences artistiques, culturelles et historiques des créateurs. La dernière partie décrypte l’oeuvre sous l’angle de sujets transversaux, de ses thématiques à sa bande-son, en passant par la gestion et l’intérêt de la difficulté dans le jeu vidéo.Plongez-vous dès à présent dans la lecture de cette analyse de Sekiro : Shadows Die Twice par un joueur passionné !EXTRAIT"Dans cet ouvrage entièrement consacré à Sekiro, nous vous proposons d’analyser et de décortiquer l’œuvre sous tous ses aspects afin d’en extraire la substantifique moelle. Certaines thématiques de l’histoire du jeu, nous le verrons, résonnent particulièrement bien avec la politique de développement instaurée par Miyazaki
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- 2020
4. Theoretical Treatment of the Redox Chemistry of Low Valent Lanthanide and Actinide Complexes
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Kefalidis, Christos E., primary, Castro, Ludovic, additional, Yahia, Ahmed, additional, Perrin, Lionel, additional, and Maron, Laurent, additional
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- 2015
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5. A DFT study of the reactivity of Cp 2AnMe 2 with pyridine N-oxide: Towards a predicted different reactivity of U/Pu and Np
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Castro, Ludovic, Yahia, Ahmed, and Maron, Laurent
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- 2010
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6. Experiments and DFT Computations Combine to Decipher Fe-Catalyzed Amidine Synthesis through Nitrene Transfer and Nitrile Insertion
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Coin, Guillaume, primary, Dubourdeaux, Patrick, additional, Avenier, Frédéric, additional, Patra, Ranjan, additional, Castro, Ludovic, additional, Lebrun, Colette, additional, Bayle, Pierre-Alain, additional, Pécaut, Jacques, additional, Blondin, Geneviève, additional, Maldivi, Pascale, additional, and Latour, Jean-Marc, additional
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- 2021
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7. Digital Devil Saga : Genèse et coulisses d'un jeu culte
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Castro, Ludovic, Castro, Ludovic, Castro, Ludovic, and Castro, Ludovic
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Un hommage rendu au jeu vidéo, avec une visée didactique !Le troisième numéro de notre collection Ludothèque est consacré aux diptyques Digital Devil Saga, spin-off de la série Shin Megami Tensei. Le contenu s'intéresse à la création des deux jeux, revient sur son scénario, mêlant mythologie hindoue et cyberpunk, son univers et son gameplay.Le troisième tome d'un recueil unique qui propose de retracer l’histoire du jeu vidéo Digital Devil Saga et de ses influences, à travers des réflexions et des analyses originales.EXTRAITMegami Tensei (MegaTen) est sans conteste l’une des séries les plus anciennes et singulières de l’histoire du J-RPG. Sorti un an après Dragon Quest et la même année que Final Fantasy, Digital Devil Story : Megami Tensei a marqué le début d’une longue histoire pour la société Atlus. Malgré des ventes dérisoires par rapport à celles des deux géants Square et Enix, la Saga est parvenue à acquérir un remarquable succès d’estime et à survivre au passage à la HD grâce à la passion et au travail de ses créateurs. Née d’une volonté de se démarquer et de proposer une alternative aux J-RPG orientés fantasy de l’époque, MegaTen a constamment fait preuve d’un esprit rebelle que les employés du studio ont su ne pas (trop) dénaturer au fil des générations.Parmi ses spin-offs, Shin Megami Tensei : Digital Devil Saga, un diptyque injustement méconnu sorti chez nous sur PS2 en 2006 et 2007. Peu de joueurs s’y étant essayés en sont sortis indemnes, notamment en raison d’un univers et d’une histoire de qualité exceptionnelle qui s’articulent autour d’un background culturel vertigineux de manière cohérente et maîtrisée. Bien que principalement basé sur l’hindouisme, son scénario propose un syncrétisme comme seuls les Japonais savent (bien) le faire en allant également piocher dans le mysticisme quantique et l’anthropologie balzacienne.À PROPOS DE L'AUTEURC’est en explorant le monde de Super Metroid à l’âge de sept ans que Ludovic Castro se retrouve pour la première f
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- 2017
8. A Combined Experimental and Theoretical Study of the Versatile Reactivity of an Oxocerium(IV) Complex: Concerted Versus Reductive Addition
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Castro, Ludovic, So, Yat-Ming, Cho, Changwoo, Lortz, Rolf Walter, Wong, Kai-Hong, Wang, Kai, Arnold, Polly L., Au-yeung, Ka Chun, Sung, Herman H. Y., Williams, Ian Duncan, Leung, Wa Hung, Maron, Laurent, Castro, Ludovic, So, Yat-Ming, Cho, Changwoo, Lortz, Rolf Walter, Wong, Kai-Hong, Wang, Kai, Arnold, Polly L., Au-yeung, Ka Chun, Sung, Herman H. Y., Williams, Ian Duncan, Leung, Wa Hung, and Maron, Laurent
- Abstract
A combined experimental and theoretical investigation on the cerium(IV) oxo complex [(LOEt)2Ce(=O)(H2O)]⋅MeC(O)NH2 (1; LOEt −=[Co(η5-C5H5){P(O)(OEt)2}3]−) demonstrates that the intermediate spin-state nature of the ground state of the cerium complex is responsible for the versatility of its reactivity towards small molecules such as CO, CO2, SO2, and NO. CASSCF calculations together with magnetic susceptibility measurements indicate that the ground state of the cerium complex is of multiconfigurational character and comprised of 74 % of CeIV and 26 % of CeIII. The latter is found to be responsible for its reductive addition behavior towards CO, SO2, and NO. This is the first report to date on the influence of the multiconfigurational ground state on the reactivity of a metal–oxo complex.
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- 2019
9. Fe‐Based Complexes as Styrene Aziridination Catalysts: Ligand Substitution Tunes Catalyst Activity
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Coin, Guillaume, primary, Patra, Ranjan, additional, Clémancey, Martin, additional, Dubourdeaux, Patrick, additional, Pécaut, Jacques, additional, Lebrun, Colette, additional, Castro, Ludovic, additional, Maldivi, Pascale, additional, Chardon‐Noblat, Sylvie, additional, and Latour, Jean‐Marc, additional
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- 2019
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10. A Combined Experimental and Theoretical Study of the Versatile Reactivity of an Oxocerium(IV) Complex: Concerted Versus Reductive Addition
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Castro, Ludovic, primary, So, Yat‐Ming, additional, Cho, Chang‐woo, additional, Lortz, Rolf, additional, Wong, Kai‐Hong, additional, Wang, Kai, additional, Arnold, Polly L., additional, Au‐Yeung, Ka‐Chun, additional, Sung, Herman H.‐Y., additional, Williams, Ian D., additional, Leung, Wa‐Hung, additional, and Maron, Laurent, additional
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- 2019
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11. Electronic Structures of Mono-Oxidized Copper and Nickel Phosphasalen Complexes
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Xemard, Mathieu, Goudy, Violaine, Braun, Augustin, Tricoire, Maxime, Ricard, Louis, Castro, Ludovic, Louyriac, Elisa, Kefalidis, Christos, Maron, Laurent, Mustieles Marín, Irene, Cheisson, Thibault, Singh-Chauhan, Rohit, Herrero, Christian, Cordier, Marie, Clavaguera, Carine, Nocton, Grégory, Auffrant, Audrey, Laboratoire de chimie moléculaire (LCM), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay-École polytechnique (X), Diversity-centric Software Engineering (DiverSe), Inria Rennes – Bretagne Atlantique, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-LANGAGE ET GÉNIE LOGICIEL (IRISA-D4), Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Université de Bretagne Sud (UBS)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-Télécom Bretagne-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-CentraleSupélec-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Université de Rennes (UNIV-RENNES)-CentraleSupélec-Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Université de Bretagne Sud (UBS)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Rennes (ENS Rennes)-Télécom Bretagne-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-CentraleSupélec, Laboratoire Hétéroéléments et Coordination (DCPH), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X), Conception d’Architectures Moléculaires et Processus Electroniques (CAMPE), SYstèmes Moléculaires et nanoMatériaux pour l’Energie et la Santé (SYMMES), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire de physique et chimie des nano-objets (LPCNO), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UPS), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Saclay, Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des mécanismes réactionnels (DCMR), and École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)
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[CHIM.INOR]Chemical Sciences/Inorganic chemistry ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
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- 2017
12. Formation of Methane versus Benzene in the Reactions of (C5Me5)(2)Th(CH3)(2) with [CH3PPh3]X (X=Cl, Br, I) Yielding Thorium-Carbene or Thorium-Ylide Complexes
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Rungthanaphatsophon, Pokpong, Bathelier, Adrien, Castro, Ludovic, Behrle, Andrew C., Barnes, Charles L., Maron, Laurent, Walensky, Justin R., Department of Chemistry, Missouri University of Science and Technology, University of Missouri [Columbia] (Mizzou), University of Missouri System-University of Missouri System, Laboratoire de physique et chimie des nano-objets (LPCNO), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Institut National Polytechnique (Toulouse) (Toulouse INP), and Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)
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carbenes ,[PHYS]Physics [physics] ,ylides ,multiple bonding ,[CHIM]Chemical Sciences ,organometallics ,thorium - Abstract
bibtex: ISI:000412189700021 bibtex\location:'POSTFACH 101161, 69451 WEINHEIM, GERMANY',publisher:'WILEY-V C H VERLAG GMBH',type:'Article',affiliation:'Walensky, JR (Reprint Author), Univ Missouri, Dept Chem, Columbia, MO 65211 USA. Maron, L (Reprint Author), Univ Toulouse, 135 Ave Rangueil, F-31077 Toulouse, France. Maron, L (Reprint Author), LPCNO, CNRS, INSA, UPS,UMR,UMR 5215, 135 Ave Rangueil, F-31077 Toulouse, France. Rungthanaphatsophon, Pokpong; Bathelier, Adrien; Barnes, Charles L.; Walensky, Justin R., Univ Missouri, Dept Chem, Columbia, MO 65211 USA. Bathelier, Adrien; Castro, Ludovic; Maron, Laurent, Univ Toulouse, 135 Ave Rangueil, F-31077 Toulouse, France. Bathelier, Adrien; Castro, Ludovic; Maron, Laurent, LPCNO, CNRS, INSA, UPS,UMR,UMR 5215, 135 Ave Rangueil, F-31077 Toulouse, France.','author-email':'laurent.maron@irsamc.ups-tlse.fr walenskyj@missouri.edu',da:'2018-12-05','doc-delivery-number':'FI7PR',eissn:'1521-3773','funding-acknowledgement':'U.S. Department of Energy, Office of Science, Early Career Research Program [DE-SC-0014174]; Humboldt Foundation; Chinese Academy of Science; CalMip','funding-text':'J.R.W. gratefully acknowledges support for this work from the U.S. Department of Energy, Office of Science, Early Career Research Program under Award Number DE-SC-0014174. L.M. is member of the Instiut Universitaire de France. The Humboldt Foundation, the Chinese Academy of Science and CalMip is acknowledged for either financial support or computing time.','journal-iso':'Angew. Chem.-Int. Edit.','keywords-plus':'CARBON MULTIPLE BOND; MOLECULAR-STRUCTURE; METALLA-ALLENES; URANIUM COMPLEX; TRANS-INFLUENCE; U-IV=C; REACTIVITY; LIGAND; CHEMISTRY; PH2PNSIME3','number-of-cited-references':'42',oa:'Bronze','orcid-numbers':'Walensky, Justin/0000-0003-0221-2675','research-areas':'Chemistry','times-cited':'5','unique-id':'ISI:000412189700021','usage-count-last-180-days':'0','usage-count-since-2013':'9','web-of-science-categories':'Chemistry, Multidisciplinary'\; International audience; The reaction of (C5Me5)(2)Th(CH3)(2) with the phosphonium salts [CH3PPh3]X (X=Cl, Br, I) was investigated. When X=Br and I, two equivalents of methane are liberated to afford (C5Me5)(2)Th[CHPPh3]X, rare terminal phosphorano-stabilized carbenes with thorium. These complexes feature the shortest thorium-carbon bonds (approximate to 2.30 angstrom) reported to date, and electronic structure calculations show some degree of multiple bonding. However, when X = Cl, only one equivalent of methane is lost with concomitant formation of benzene from an unstable phosphorus(V) intermediate, yielding (C5Me5)(2)Th[kappa(2)-(C,C')-(CH2)(CH2)PPh2]Cl. Density functional theory (DFT) investigations of the reaction energy profiles for [CH3PPh3]X, X = Cl and I showed that in the case of iodide, thermodynamics prevents the production of benzene and favors formation of the carbene.
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- 2017
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13. Reductive Disproportionation of CO2 with Bulky Divalent Samarium Complexes
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Xemard, Mathieu, Goudy, Violaine, Braun, Augustin, Tricoire, Maxime, Cordier, Marie, Ricard, Louis, Castro, Ludovic, Louyriac, Elisa, Kefalidis, Christos E., Clavaguera, Carine, Maron, Laurent, Nocton, Grégory, Laboratoire de chimie moléculaire (LCM), École polytechnique (X)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique et chimie des nano-objets (LPCNO), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Chimie Physique D'Orsay (LCPO), Université Paris-Sud - Paris 11 (UP11)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X), Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
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[PHYS]Physics [physics] ,[CHIM]Chemical Sciences - Abstract
bibtex: ISI:000418109700020 bibtex\location:'1155 16TH ST, NW, WASHINGTON, DC 20036 USA',publisher:'AMER CHEMICAL SOC',type:'Article',affiliation:'Nocton, G (Reprint Author), Univ Paris Saclay, CNRS, Ecole Polytech, LCM, Route Saclay, F-91128 Palaiseau, France. Xemard, Mathieu; Goudy, Violaine; Braun, Augustin; Tricoire, Maxime; Cordier, Marie; Ricard, Louis; Nocton, Gregory, Univ Paris Saclay, CNRS, Ecole Polytech, LCM, Route Saclay, F-91128 Palaiseau, France. Castro, Ludovic; Louyriac, Elisa; Kefalidis, Christos E.; Maron, Laurent, Univ Toulouse, CNRS, UMR 5215, LPCNO,INSA,UPS, Toulouse, France. Clavaguera, Carine, Univ Pari Saclay, Univ Paris Sud, CNRS, Lab Chim Phys, 15 Ave Jean Perrin, F-91405 Orsay, France.','author-email':'greg.nocton@polytechnique.edu',da:'2018-12-05','doc-delivery-number':'FQ1IG',eissn:'1520-6041','funding-acknowledgement':'French National Agency [ANR-15-CE29-0019]; CNRS; Ecole polytechnique; DGA','funding-text':'This project was financed by the French National Agency with grant number ANR-15-CE29-0019. We thank the CNRS and Ecole polytechnique for funding. M.X. is grateful to the DGA for funding. L.M. is a member of the Institut Universitaire de France.','journal-iso':'Organometallics','keywords-plus':'BIPYRIDYL THORIUM METALLOCENE; SOLID-STATE STRUCTURES; RARE-EARTH-ELEMENTS; CARBON-MONOXIDE; ORGANOMETALLIC COMPOUNDS; LANTHANIDE COMPLEXES; CRYSTAL-STRUCTURE; ACTIVATION; REACTIVITY; COORDINATION','number-of-cited-references':'65','orcid-numbers':'Clavaguera, Carine/0000-0001-5531-2333','research-areas':'Chemistry','researcherid-numbers':'Clavaguera, Carine/A-1433-2013 Nocton, Greg/D-4435-2009','times-cited':'3','unique-id':'ISI:000418109700020','usage-count-last-180-days':'7','usage-count-since-2013':'14','web-of-science-categories':'Chemistry, Inorganic & Nuclear; Chemistry, Organic'\; The base-free divalent samarium complex (Cp2Sm)-Sm-tt (1; Cp-tt = 1,3-(Bu-t)(2)(C5H3)) has been synthesized in diethyl ether by salt metathesis of SmI2. Crystals of 1 suitable for X-ray study have been obtained by sublimation at 116 degrees C under reduced pressure. The dissolution of 1 in thf and pyridine solution leads to the solvent adducts (Ce2Sm)-Sm-tt(thf)(2) (3) and (Ce2Sm)-Sm-tt(py) (4), respectively, while drying 3 under reduced pressure yields (CpSm)-Sm-tt(thf) (5). The reaction of CO2 with the base-free divalent samarium complexes (Cp2Sm)-Sm-tt (1) and (Cp2Sm)-Sm-ttt (2; Cp-ttt =1,2,4-(Bu-t)(3)(C5H2)) leads to the clean formation of bridged carbonate samarium dimers [(Cr2Sm)-Sm-ttt](2)(mu-CO3) (7) and [(Cp2Sm)-Sm-tt](2)(mu-CO3) (8). This is indicative of the reductive disproportionation of CO2 in both cases with release of CO. This contrasts with the formation of the oxalate-bridged samarium dimer reported from the reaction of CO2 with the Cp*Sm-2(thf)(2) complex. Otherwise, the reaction with CO does not proceed with the bulky complexes, while traces of O-2 have led to the formation of the original bridged peroxo samarium dimer [Cp(2)(ttt)sm](2)(mu-O-2) (6). The mechanism for these reactions is studied herein by experiments and also by theoretical computations. The key result is that the different pathways are rather close in energy, which also explains why the nature of the final product, if only one is present, is difficult to predict a priori in this chemistry.
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- 2017
14. A Theoretical Outlook on the Stereoselectivity Origins of Isoselective Zirconocene Propylene Polymerization Catalysts
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Castro, Ludovic, primary, Therukauff, Gabriel, additional, Vantomme, Aurelien, additional, Welle, Alexandre, additional, Haspeslagh, Luc, additional, Brusson, Jean‐Michel, additional, Maron, Laurent, additional, Carpentier, Jean‐François, additional, and Kirillov, Evgueni, additional
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- 2018
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15. Dinitrogen functionalization at a ditantalum center. Balancing N2 displacement and N2 functionalization in the reaction of coordinated N2 with CS2
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Burford, Richard J., primary, Castro, Ludovic, additional, Maron, Laurent, additional, Hein, Jason E., additional, and Fryzuk, Michael D., additional
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- 2018
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16. Concomitant Carboxylate and Oxalate Formation From the Activation of CO 2 by a Thorium(III) Complex
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Formanuik, Alasdair, Ortu, Fabrizio, Inman, Christopher, Kerridge, Andrew, Castro, Ludovic, Maron, Laurent, Mills, David, School of Chemistry [Manchester], University of Manchester [Manchester], Department of Chemistry, School of Life Sciences, University of Sussex, Univ Lancaster, Dept Chem, Lancaster LA1 4YB, England, Laboratoire de physique et chimie des nano-objets (LPCNO), Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC), University of Sussex, Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
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[CHIM]Chemical Sciences - Abstract
International audience; Improving our comprehension of diverse CO2 activation pathways is of vital importance for the widespread future utilization of this abundant greenhouse gas. CO2 activation by uranium(III) complexes is now relatively well understood, with oxo/carbonate formation predominating as CO2 is readily reduced to CO, but isolated thorium(III) CO2 activation is unprecedented. We show that the thorium(III) complex, [Th(Cp′′)3] (1, Cp′′={C5H3(SiMe3)2‐1,3}), reacts with CO2 to give the mixed oxalate‐carboxylate thorium(IV) complex [{Th(Cp′′)2[κ2‐O2C{C5H3‐3,3′‐(SiMe3)2}]}2(μ‐κ2:κ2‐C2O4)] (3). The concomitant formation of oxalate and carboxylate is unique for CO2 activation, as in previous examples either reduction or insertion is favored to yield a single product. Therefore, thorium(III) CO2 activation can differ from better understood uranium(III) chemistry.
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- 2016
17. Concomitant Carboxylate and Oxalate Formation From the Activation of CO2 by a Thorium(III) Complex
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Formanuik, Alasdair, Ortu, Fabrizio, Inman, Christopher J., Kerridge, Andrew, Castro, Ludovic, and Mills, David
- Abstract
Improving our comprehension of diverse CO2 activation pathways is of vital importance for the widespread future utilization of an abundant greenhouse gas. CO2 activation by uranium(III) complexes is now relatively well understood, with oxo/carbonate formation predominating as CO2 is readily reduced to CO, but isolated thorium(III) CO2 activation is unprecedented. We show that the thorium(III) complex, [Th(Cp′′)3] (1, Cp′′ = {C5H3(SiMe3)2-1,3}), reacts with CO2 to give the mixed oxalate-carboxylate thorium(IV) complex [{Th(Cp′′)2[κ2-O2C{C5H3-3,3′-(SiMe3)2}]}2(µ-κ2:κ2-C2O4)] (3). The concomitant formation of oxalate and carboxylate is unique for CO2 activation, as in previous examples either reduction or insertion is favored to yield a single product. Therefore, thorium(III) CO2 activation can differ from better understood uranium(III) chemistry.
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- 2016
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18. Activation of Heteroallenes CO x S 2- x ( x = 0-2): Experimental and Theoretical Evidence of the Synthetic Versatility of a Bulky Guanidinato Sm II Complex
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Castro, Ludovic, Mills, David, Jones, Cameron, Maron, Laurent, Laboratoire de physique et chimie des nano-objets (LPCNO), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), School of Chemistry [Manchester], University of Manchester [Manchester], Monash University [Melbourne], School of Chemistry, Monash University, 3800 Clayton, Victoria (Australie), Monash University [Clayton], Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC), and School of Chemistry, Monash UniVersity, Clayton, VIC. 3800 (Australia)
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[CHIM]Chemical Sciences - Abstract
International audience; A joint experimental/theoretical (DFT) study of the activation of heteroallenes COxS2–x (x = 0–2) by [Sm(Giso)2] {Giso– = [(ArN)2CNCy2]–, Cy = cyclohexyl, Ar = 2,6‐diisopropylphenyl} is reported. All heteroallenes are reduced in a different manner. Indeed, while activation of CS2 yields a bimetallic CS2 coupled product through C–S bond formation, CO2 forms an oxalate complex through C–C bond formation. This subsequently undergoes CO2 insertion into one of its Sm–N bonds. Finally, COS activation is predicted to yield a dithiocarbonate complex, through the formation of an intermediate sulfido complex [(Giso)2Sm(µ‐S)Sm(Giso)2]. Therefore, [Sm(Giso)2] is a very versatile reagent, since it is a rare example of a complex that allows formation of several activation products involving valence isoelectronic substrates. This is rationalized by DFT calculations, and the latter emphasizes both the lack of kinetic stability of CS vs. CO and the high thermodynamic stability of the oxalate.
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- 2016
19. Formation of Methane versus Benzene in the Reactions of (C 5 Me 5 ) 2 Th(CH 3 ) 2 with [CH 3 PPh 3 ]X (X=Cl, Br, I) Yielding Thorium‐Carbene or Thorium‐Ylide Complexes
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Rungthanaphatsophon, Pokpong, primary, Bathelier, Adrien, additional, Castro, Ludovic, additional, Behrle, Andrew C., additional, Barnes, Charles L., additional, Maron, Laurent, additional, and Walensky, Justin R., additional
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- 2017
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20. Rational design of Fe catalysts for olefin aziridination through DFT-based mechanistic analysis
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Patra, Ranjan, primary, Coin, Guillaume, additional, Castro, Ludovic, additional, Dubourdeaux, Patrick, additional, Clémancey, Martin, additional, Pécaut, Jacques, additional, Lebrun, Colette, additional, Maldivi, Pascale, additional, and Latour, Jean-Marc, additional
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- 2017
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21. Formation of a Bridging Phosphinidene Thorium Complex
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Behrle, Andrew, Castro, Ludovic, Maron, Laurent, Walensky, Justin, Department of Chemistry, Missouri University of Science and Technology, 142 Schrenk Hall, 400 West 11th Street, Rolla, Missouri 65409, United States, Missouri University of Science and Technology (Missouri S&T), University of Missouri System-University of Missouri System, Laboratoire de physique et chimie des nano-objets (LPCNO), Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
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[PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph] - Abstract
International audience; The synthesis and structural determination of the first thorium phosphinidene complex are reported. The reaction of 2 equiv of (C5Me5)2Th(CH3)2 with H2P(2,4,6-iPr3C6H2) at 95 °C produces [(C5Me5)2Th]2(μ2-P[(2,6-CH2CHCH3)2-4-iPrC6H2] as well as 4 equiv of methane, 2 equiv from deprotonation of the phosphine and 2 equiv from C–H bond activation of one methyl group of each of the isopropyl groups at the 2- and 6-positions. Transition state calculations indicate that the steps in the mechanism are P–H, C–H, C–H, and then P–H bond activation to form the phosphinidene.
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- 2015
22. Controlling selectivity in the reductive activation of CO 2 by mixed sandwich uranium( iii ) complexes
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Tsoureas, Nikolaos, Castro, Ludovic, Kilpatrick, Alexander, Cloke, F. Geoffey N., Maron, Laurent, School of Life Sciences [Brighton, East Sussex, UK], University of Sussex, Laboratoire de physique et chimie des nano-objets (LPCNO), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Institut National Polytechnique (Toulouse) (Toulouse INP), and Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)
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[PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph] - Abstract
International audience; The synthesis and molecular structures of a range of uranium(III) mixed sandwich complexes of the type [U(η8-C8H6(1,4-SiMe3)2)(η5-CpMe4R)] (R = Me, Et, iPr, tBu) and their reactivity towards CO2 are reported. The nature of the R group on the cyclopentadienyl ring in the former has a significant effect on the outcome of CO2 activation: when R = Me, the products are the bridging oxo complex {U[η8-C8H6(1,4-SiMe3)2](η5-CpMe5)}2(μ-O) and the bridging oxalate complex {U[η8-C8H6(1,4-SiMe3)2](η5-CpMe5)}2(μ-η2:η2-C2O4); for R = Et or iPr, bridging carbonate {U[η8-C8H6(1,4-SiMe3)2](η5-CpMe4R)}2(μ-η1:η2-CO3) and bridging oxalate complexes {U[η8-C8H6(1,4-SiMe3)2](η5-CpMe4R)}2(μ-η2:η2-C2O4) are formed in both cases; and when R = tBu the sole product is the bridging carbonate complex {U[η8-C8H6(1,4-SiMe3)2](η5-CpMe4tBu)}2(μ-η1:η2-CO3). Electrochemical studies on both the uranium(III) complexes and the dimeric uranium(IV) CO2 reduction products have been carried out and all exhibit quasi reversible redox processes; in particular, the similarities in the U(III)/U(IV) redox couples suggest that the selectivity in the outcome of CO2 reductive activation by these complexes is steric in origin rather than electronic. The latter conclusion is supported by a detailed computational DFT study on the potential mechanistic pathways for reduction of CO2 by this system.
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- 2014
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23. Concomitant Carboxylate and Oxalate Formation From the Activation of CO2by a Thorium(III) Complex
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Formanuik, Alasdair, primary, Ortu, Fabrizio, additional, Inman, Christopher J., additional, Kerridge, Andrew, additional, Castro, Ludovic, additional, Maron, Laurent, additional, and Mills, David P., additional
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- 2016
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24. ChemInform Abstract: New Perspectives in Organolanthanide Chemistry from Redox to Bond Metathesis: Insights from Theory
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Kefalidis, Christos E., primary, Castro, Ludovic, additional, Perrin, Lionel, additional, Rosal, Iker Del, additional, and Maron, Laurent, additional
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- 2016
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25. Activation of Heteroallenes COxS2– x( x = 0–2): Experimental and Theoretical Evidence of the Synthetic Versatility of a Bulky Guanidinato Sm II Complex
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Castro, Ludovic, primary, Mills, David P., additional, Jones, Cameron, additional, and Maron, Laurent, additional
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- 2016
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26. Insights into structure and redox potential of lignin peroxidase from QM/MM calculations
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Castro, Ludovic, primary, Crawford, L. Ellis, additional, Mutengwa, Archford, additional, Götze, Jan P., additional, and Bühl, Michael, additional
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- 2016
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27. New perspectives in organolanthanide chemistry from redox to bond metathesis: insights from theory
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Kefalidis, Christos E., primary, Castro, Ludovic, additional, Perrin, Lionel, additional, Rosal, Iker Del, additional, and Maron, Laurent, additional
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- 2016
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28. A Theoretical Outlook on the Stereoselectivity Origins of Isoselective Zirconocene Propylene Polymerization Catalysts.
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Maron, Laurent, Castro, Ludovic, Therukauff, Gabriel, Carpentier, Jean‐François, Kirillov, Evgueni, Vantomme, Aurelien, Welle, Alexandre, Haspeslagh, Luc, and Brusson, Jean‐Michel
- Abstract
Abstract: The first three insertion steps of propylene for isoselective metallocenes from the one‐carbon‐bridged cyclopentadienyl–fluorenyl {Cp/Flu} and silicon‐bridged ansa‐bis(indenyl) {SBI} families were computed by using a theoretical method implementing the B3PW91 functional in combination with solvent corrections incorporated with the Solvation Model based on Density (SMD) continuum model. For C1‐symmetric {Cp/Flu}‐type metallocenes, two mechanisms of stereocontrol were validated theoretically: more facile and more stereoselective chain “stationary” insertion (or site epimerization backskip) and less stereoselective alternating mechanisms. For the C2‐symmetric {SBI}‐type system, the computation results were in complete agreement with the sole operating chain migratory insertion mechanism. The thermochemical data obtained through the study were used to predict microstructures of polypropylenes by using three‐parameter and one‐parameter statistical models for the two metallocene systems, respectively. The calculated meso/rac pentad distributions were found to be in good agreement with those determined experimentally for isotactic polypropylene samples obtained at different polymerization temperatures. [ABSTRACT FROM AUTHOR]
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- 2018
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29. Dinitrogen functionalization at a ditantalum center. Balancing N2 displacement and N2 functionalization in the reaction of coordinated N2 with CS2.
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Burford, Richard J., Castro, Ludovic, Maron, Laurent, Hein, Jason E., and Fryzuk, Michael D.
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NITROGEN , *CARBON disulfide , *TANTALUM compounds - Abstract
The reaction of carbon disulfide (CS2) with the side-on end-on dinitrogen complex ([NPNSi]Ta)2(μ–η1:η2-N2)(μ-H)2 (1) (where [NPNSi] = [PhP(CH2SiMe2NPh)2]) has been studied and shown to generate two products, the ratio of which depends on the concentration of added carbon disulfide. At high concentrations of CS2, N–N bond cleavage and functionalization occur to generate a ditantalum complex with an isothiocyanato ligand N-bound to Ta along with bridging sulfido and nitrido moieties. At lower concentrations of CS2, less dinitrogen functionalization is observed; instead, N2 is displaced and the CS2 molecule is completely disassembled to generate a ditantalum derivative with bridging methylene and two sulfide moieties. Kinetic and DFT studies have been performed and provide clues about the product ratio and mechanistic information and shed light on why N2 functionalization is challenging. [ABSTRACT FROM AUTHOR]
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- 2018
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30. Dinitrogen functionalization at a ditantalum center. Balancing N2 displacement and N2 functionalization in the reaction of coordinated N2 with CS2.
- Author
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Burford, Richard J., Castro, Ludovic, Maron, Laurent, Hein, Jason E., and Fryzuk, Michael D.
- Subjects
NITROGEN ,CARBON disulfide ,TANTALUM compounds - Abstract
The reaction of carbon disulfide (CS
2 ) with the side-on end-on dinitrogen complex ([NPNSi ]Ta)2 (μ–η1 :η2 -N2 )(μ-H)2 (1) (where [NPNSi ] = [PhP(CH2 SiMe2 NPh)2 ]) has been studied and shown to generate two products, the ratio of which depends on the concentration of added carbon disulfide. At high concentrations of CS2 , N–N bond cleavage and functionalization occur to generate a ditantalum complex with an isothiocyanato ligand N-bound to Ta along with bridging sulfido and nitrido moieties. At lower concentrations of CS2 , less dinitrogen functionalization is observed; instead, N2 is displaced and the CS2 molecule is completely disassembled to generate a ditantalum derivative with bridging methylene and two sulfide moieties. Kinetic and DFT studies have been performed and provide clues about the product ratio and mechanistic information and shed light on why N2 functionalization is challenging. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
- View/download PDF
31. Selectivity in the C-H Activation Reaction of CH3OSO2CH3 with [1,2,4-(Me3C)3C5H2]2CeH or [1,2,4-(Me3C)3C5H2][1,2-(Me3C)2-4-(Me2CCH2)C5H2]Ce: To Choose or Not To Choose
- Author
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Werkema, Evan L., Castro, Ludovic, Maron, Laurent, Eisenstein, Odile, Andersen, Richard A., Lawrence Berkeley National Laboratory [Berkeley] (LBNL), Laboratoire de physique et chimie des nano-objets (LPCNO), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut de Chimie de Toulouse (ICT-FR 2599), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), and Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
[CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry ,[CHIM.CATA]Chemical Sciences/Catalysis - Abstract
International audience; The experimental reaction of [1,2,4-(Me3C)3C5H2]2CeH, Cp′2CeH, and CH3OSO2CH3 begins by α-C-H activation of the SCH3 group, forming Cp′2CeCH2SO2(OCH3), which evolves into Cp′2CeOCH3 with elimination of CH2 (and presumably SO2). Prolonged heating of this mixture (days at 60 °C) forms Cp′2CeOSO2CH3 and CH3OCH3. The metallacycle [1,2,4-(Me3C)3C5H2][1,2-(Me3C)2-4-(Me2CCH2)C5H2]Ce, when presented with the choice of C-H bonds in CH3S and CH3O groups, deprotonates both with comparable rates, ultimately forming Cp′2CeOCH3 and Cp′2CeOSO2CH3 at 20 °C. The experimental studies are illuminated by DFT calculations on the experimental systems, which show that the hydride selects the more acidic CH3S bond, whereas the metallacycle reacts with C-H bonds of both the CH3S and CH3O groups of CH3OSO2CH3. In the metallacycle reaction, the initially formed regioisomers, Cp′2CeCH2SO2(OCH3) and Cp′2CeCH2OSO2CH3, rearrange to the observed products, Cp′2CeOCH3 and Cp′2CeOSO2CH3, respectively. Furthermore, C-H activation at the SCH3 group forms two isomers of Cp′2CeCH2SO2(OCH3) in the reaction of CH3OSO2CH3 with the metallacycle and only one in the reaction with the hydride. The lack of selectivity in the reactions of the metallacycle relative to the hydride is due to the metallacycle's greater thermodynamic advantage and lower energy barriers, which are linked to the higher bond energy of Ce-H relative to Ce-C in the metallacycle.
- Published
- 2012
- Full Text
- View/download PDF
32. Study of nanostructuration of sapphire vicinal surface for application of self organized oxide nanoparticles
- Author
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Thune, Elsa, Castro, Ludovic, Boulle, Alexandre, Bachelet, R., Guinebretière, René, Segear, Martine, Axe 3 : organisation structurale multiéchelle des matériaux, Science des Procédés Céramiques et de Traitements de Surface (SPCTS), Université de Limoges (UNILIM)-Ecole Nationale Supérieure de Céramique Industrielle (ENSCI)-Institut des Procédés Appliqués aux Matériaux (IPAM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Ecole Nationale Supérieure de Céramique Industrielle (ENSCI)-Institut des Procédés Appliqués aux Matériaux (IPAM), and Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
- Published
- 2008
33. Reductive Disproportionation of CO2 with Bulky Divalent Samarium Complexes.
- Author
-
Xémard, Mathieu, Goudy, Violaine, Braun, Augustin, Tricoire, Maxime, Cordier, Marie, Ricard, Louis, Castro, Ludovic, Louyriac, Elisa, Kefalidis, Christos E., Clavaguéra, Carine, Maron, Laurent, and Nocton, Grégory
- Published
- 2017
- Full Text
- View/download PDF
34. Formation of Methane versus Benzene in the Reactions of (C5Me5)2Th(CH3)2 with [CH3PPh3]X (X=Cl, Br, I) Yielding Thorium-Carbene or Thorium-Ylide Complexes.
- Author
-
Rungthanaphatsophon, Pokpong, Bathelier, Adrien, Castro, Ludovic, Behrle, Andrew C., Barnes, Charles L., Maron, Laurent, and Walensky, Justin R.
- Subjects
METHANE ,BENZENE ,CHEMICAL reactions ,COMPLEX compounds ,CARBENES ,PHOSPHONIUM compounds - Abstract
The reaction of (C
5 Me5 )2 Th(CH3 )2 with the phosphonium salts [CH3 PPh3 ]X (X=Cl, Br, I) was investigated. When X=Br and I, two equivalents of methane are liberated to afford (C5 Me5 )2 Th[CHPPh3 ]X, rare terminal phosphorano-stabilized carbenes with thorium. These complexes feature the shortest thorium-carbon bonds (≈2.30 Å) reported to date, and electronic structure calculations show some degree of multiple bonding. However, when X=Cl, only one equivalent of methane is lost with concomitant formation of benzene from an unstable phosphorus(V) intermediate, yielding (C5 Me5 )2 Th[κ2 -(C,C′)-(CH2 )(CH2 )PPh2 ]Cl. Density functional theory (DFT) investigations of the reaction energy profiles for [CH3 PPh3 ]X, X=Cl and I showed that in the case of iodide, thermodynamics prevents the production of benzene and favors formation of the carbene. [ABSTRACT FROM AUTHOR]- Published
- 2017
- Full Text
- View/download PDF
35. Are Solvent and Dispersion Effects Crucial in Olefin Polymerization DFT Calculations? Some Insights from Propylene Coordination and Insertion Reactions with Group 3 and 4 Metallocenes
- Author
-
Castro, Ludovic, primary, Kirillov, Evgueni, additional, Miserque, Olivier, additional, Welle, Alexandre, additional, Haspeslagh, Luc, additional, Carpentier, Jean-François, additional, and Maron, Laurent, additional
- Published
- 2014
- Full Text
- View/download PDF
36. ChemInform Abstract: Theoretical Treatment of One Electron Redox Transformation of a Small Molecule Using F‐Element Complexes
- Author
-
Castro, Ludovic, primary, Kefalidis, Christos E., additional, McKay, David, additional, Essafi, Stephanie, additional, Perrin, Lionel, additional, and Maron, Laurent, additional
- Published
- 2014
- Full Text
- View/download PDF
37. Theoretical treatment of one electron redox transformation of a small molecule using f-element complexes
- Author
-
Castro, Ludovic, primary, Kefalidis, Christos E., additional, McKay, David, additional, Essafi, Stéphanie, additional, Perrin, Lionel, additional, and Maron, Laurent, additional
- Published
- 2014
- Full Text
- View/download PDF
38. Controlling selectivity in the reductive activation of CO2 by mixed sandwich uranium(iii) complexes
- Author
-
Tsoureas, Nikolaos, primary, Castro, Ludovic, additional, Kilpatrick, Alexander F. R., additional, Cloke, F. Geoffey N., additional, and Maron, Laurent, additional
- Published
- 2014
- Full Text
- View/download PDF
39. International network of provenance trials in cork oak (Quercus suber L.)
- Author
-
Varela, M.C., Almeida, M.H., Chambel, R., Barros, I.R., Bariteau, Michel, Muhs, H., Von Wuehlishl, G., Belarosa, R., Sbay, H., Gil, Gabin, Catalan, G., Iglesias, S., Jiménez, P., Castro, Ludovic, Diaz, P.M., Eriksson, G., Khouja, Mohamed Larbi, Khaldi, Abdelhamid, Estaçao Florestal Nacional, Universidade de Lisboa (ULISBOA), Unité de gestion du département adjoint écologie des forêts prairies et milieux aquatiques (direction), Institut National de la Recherche Agronomique (INRA), Federal Research Centre for Forestry and Forest Products, Tuscia University, Administration des Eaux et Forêts et de la conservation des sols, Partenaires INRAE, Universidad Politécnica de Madrid (UPM), Centro de Investigacion Forestal (INIA-CIFOR), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria = National Institute for Agricultural and Food Research and Technology (INIA), Direccion General de Ambiente, Department of Forest Genetics, Federal Research and Training Centre for Forests Natural Hazards and Landscape, Institut National de Recherche en Génie Rural Eaux et Forêts (INRGREF), and Ecole Nationale du Génie Rural, des Eaux et des Forêts (ENGREF)-Institution de la Recherche et de l'Enseignement Supérieur Agricoles [Tunis] (IRESA)
- Subjects
[SDV]Life Sciences [q-bio] ,ComputingMilieux_MISCELLANEOUS - Abstract
National audience
- Published
- 2002
40. Etude théorique de la structure et de la réactivité de complexes de lanthanides et d'actinides : activation de petites molécules
- Author
-
Castro, Ludovic and Castro, Ludovic
- Abstract
Cette thèse présente une étude théorique au niveau DFT de la structure et de la réactivité de complexes organométalliques de lanthanides et d'actinides. Après une introduction générale aux méthodes de chimie théorique employées pour traiter la réactivité de complexes organométalliques, une étude de la participation des électrons 5f dans la réactivité des complexes d'uranium(IV) est présentée. Il est montré qu'il est possible d'utiliser sans crainte des pseudopotentiels relativistes à grand cœur pour un certain nombre de problèmes de réactivité et qu'ainsi les électrons 5f peuvent être traités de manière implicite. Ensuite, la réactivité de complexes d'uranium(III) avec CO2 et autres molécules analogues est étudiée à travers plusieurs exemples issus de la littérature. Ces études montrent que la nature stérique des ligands impliqués est d'une importance capitale et contrôle la réactivité. Cette étude est étendue à un complexe de samarium(II). Enfin, la réactivité entre un complexe hydrure de cérium(III) et MeOSO2Me est étudiée et les résultats théoriques sont comparés aux observations expérimentales., This PhD thesis presents a theoretical study of the structure and the reactivity of organometallic complexes of lanthanides and actinides at the DFT level. After a general introduction of the methods of theoretical chemistry used for the modelling of organometallic reactivity, a study of the participation of 5f electrons in uranium(IV) reactivity is presented. The results show that the large core ECP can be used safely in order to treat the actinide and so that 5f electrons can be treated implicitly. Then, the reactivity of uranium(III) complexes with CO2 and other analogous molecules is studied via multiple examples from the literature. These studies show that the steric nature of the ligands is very important and controls the reactivity. This study is then extended to samarium(II) complex. Eventually, the reactivity of a hydride complex of cerium(III) with MeOSO2Me is investigated and theoretical results are compared with experimental observations.
- Published
- 2012
41. Calculations of One-Electron Redox Potentials of Oxoiron(IV) Porphyrin Complexes
- Author
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Castro, Ludovic, primary and Bühl, Michael, additional
- Published
- 2013
- Full Text
- View/download PDF
42. Computational Insight into 103Rh Chemical Shift–Structure Correlations in Rhodium Bis(phosphine) Complexes
- Author
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Ortuño, Manuel A., primary, Castro, Ludovic, additional, and Bühl, Michael, additional
- Published
- 2013
- Full Text
- View/download PDF
43. Oxo-Functionalization and Reduction of the Uranyl Ion through Lanthanide-Element Bond Homolysis: Synthetic, Structural, and Bonding Analysis of a Series of Singly Reduced Uranyl–Rare Earth 5f1-4fn Complexes
- Author
-
Arnold, Polly L., primary, Hollis, Emmalina, additional, Nichol, Gary S., additional, Love, Jason B., additional, Griveau, Jean-Christophe, additional, Caciuffo, Roberto, additional, Magnani, Nicola, additional, Maron, Laurent, additional, Castro, Ludovic, additional, Yahia, Ahmed, additional, Odoh, Samuel O., additional, and Schreckenbach, Georg, additional
- Published
- 2013
- Full Text
- View/download PDF
44. Reduction of Carbon Dioxide Promoted by a Dinuclear Tantalum Tetrahydride Complex
- Author
-
Ballmann, Joachim, primary, Pick, Fraser, additional, Castro, Ludovic, additional, Fryzuk, Michael D., additional, and Maron, Laurent, additional
- Published
- 2013
- Full Text
- View/download PDF
45. Decamethylscandocinium-hydrido-(perfluorophenyl)borate: fixation and tandem tris(perfluorophenyl)borane catalysed deoxygenative hydrosilation of carbon dioxide
- Author
-
Berkefeld, Andreas, primary, Piers, Warren E., additional, Parvez, Masood, additional, Castro, Ludovic, additional, Maron, Laurent, additional, and Eisenstein, Odile, additional
- Published
- 2013
- Full Text
- View/download PDF
46. Cleaving bonds in CH3OSO2CF3with [1,2,4-(Me3C)3C5H2]2CeH; an experimental and computational study
- Author
-
Werkema, Evan L., primary, Castro, Ludovic, additional, Maron, Laurent, additional, Eisenstein, Odile, additional, and Andersen, Richard A., additional
- Published
- 2013
- Full Text
- View/download PDF
47. Concomitant Carboxylate and Oxalate Formation From the Activation of CO2 by a Thorium(III) Complex.
- Author
-
Formanuik, Alasdair, Ortu, Fabrizio, Inman, Christopher J., Kerridge, Andrew, Castro, Ludovic, Maron, Laurent, and Mills, David P.
- Subjects
CHEMICAL synthesis ,CARBOXYLATES ,OXALATES ,CARBON dioxide reduction ,ACTIVATION (Chemistry) ,THORIUM compounds ,GREENHOUSE gases ,INSERTION reactions (Chemistry) ,URANIUM compounds synthesis - Abstract
Improving our comprehension of diverse CO
2 activation pathways is of vital importance for the widespread future utilization of this abundant greenhouse gas. CO2 activation by uranium(III) complexes is now relatively well understood, with oxo/carbonate formation predominating as CO2 is readily reduced to CO, but isolated thorium(III) CO2 activation is unprecedented. We show that the thorium(III) complex, [Th(Cp′′)3 ] ( 1, Cp′′={C5 H3 (SiMe3 )2 -1,3}), reacts with CO2 to give the mixed oxalate-carboxylate thorium(IV) complex [{Th(Cp′′)2 [κ2 -O2 C{C5 H3 -3,3′-(SiMe3 )2 }]}2 (μ-κ2 :κ2 -C2 O4 )] ( 3). The concomitant formation of oxalate and carboxylate is unique for CO2 activation, as in previous examples either reduction or insertion is favored to yield a single product. Therefore, thorium(III) CO2 activation can differ from better understood uranium(III) chemistry. [ABSTRACT FROM AUTHOR]- Published
- 2016
- Full Text
- View/download PDF
48. Activation of Heteroallenes CO xS2- x ( x = 0-2): Experimental and Theoretical Evidence of the Synthetic Versatility of a Bulky Guanidinato SmII Complex.
- Author
-
Castro, Ludovic, Mills, David P., Jones, Cameron, and Maron, Laurent
- Subjects
- *
SAMARIUM compounds , *METAL complexes , *CARBON monoxide , *ALLENE , *COVALENT bonds , *THERMAL stability - Abstract
A joint experimental/theoretical (DFT) study of the activation of heteroallenes CO xS2- x ( x = 0-2) by [Sm(Giso)2] {Giso- = [(ArN)2CNCy2]-, Cy = cyclohexyl, Ar = 2,6-diisopropylphenyl} is reported. All heteroallenes are reduced in a different manner. Indeed, while activation of CS2 yields a bimetallic CS2 coupled product through C-S bond formation, CO2 forms an oxalate complex through C-C bond formation. This subsequently undergoes CO2 insertion into one of its Sm-N bonds. Finally, COS activation is predicted to yield a dithiocarbonate complex, through the formation of an intermediate sulfido complex [(Giso)2Sm(µ-S)Sm(Giso)2]. Therefore, [Sm(Giso)2] is a very versatile reagent, since it is a rare example of a complex that allows formation of several activation products involving valence isoelectronic substrates. This is rationalized by DFT calculations, and the latter emphasizes both the lack of kinetic stability of CS vs. CO and the high thermodynamic stability of the oxalate. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
49. Cleavage of Carbon Monoxide Promoted by a Dinuclear Tantalum Tetrahydride Complex
- Author
-
Ballmann, Joachim, primary, Pick, Fraser, additional, Castro, Ludovic, additional, Fryzuk, Michael D., additional, and Maron, Laurent, additional
- Published
- 2012
- Full Text
- View/download PDF
50. Carbon Monoxide Activation via O-Bound CO Using Decamethylscandocinium–Hydridoborate Ion Pairs
- Author
-
Berkefeld, Andreas, primary, Piers, Warren E., additional, Parvez, Masood, additional, Castro, Ludovic, additional, Maron, Laurent, additional, and Eisenstein, Odile, additional
- Published
- 2012
- Full Text
- View/download PDF
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