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1. Synthesis and Structure of the Dimethyl Sulfide Adducts of Mono- and Bis(pentafluorophenyl)borane

Author

Callum M. White, David L. Hughes, Simon J. Lancaster, and Anna-Marie Fuller

Subjects
Tris, Chemistry, Hydride, Organic Chemistry, Borane, Medicinal chemistry, Adduct, Inorganic Chemistry, chemistry.chemical_compound, Reagent, Organic chemistry, Dimethyl sulfide, Physical and Theoretical Chemistry, Diethyl ether
Abstract

The borane dimethyl sulfide adduct H3B·SMe2 and the diethyl ether adduct of tris(pentafluorophenyl)borane, (C6F5)3B·OEt2, undergo facile exchange of hydride and pentafluorophenyl ligands, yielding (C6F5)2HB·SMe2 (1) and (C6F5)H2B·SMe2 (2) depending upon the ratio of reagents used. In the presence of excess dimethyl sulfide, both compounds can be isolated as colorless crystals, which have been structurally characterized.

Published
2010
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2. Synthesis, Structure, and Stability of Adducts between Phosphide and Amide Anions and the Lewis Acids Borane, Tris(pentafluorophenyl)borane, and Tris(pentafluorophenyl)alane

Author

Andrew J. Mountford, Matthew L. Scott, Simon J. Coles, Anna-Marie Fuller, Peter N. Horton, Simon J. Lancaster, Michael B. Hursthouse, and David L. Hughes

Subjects
Anions, Models, Molecular, Hydrocarbons, Fluorinated, Molecular Structure, Phosphines, Hydride, Inorganic chemistry, Molecular Conformation, Center (category theory), Stereoisomerism, Borane, Crystallography, X-Ray, Amides, Medicinal chemistry, Adduct, Inorganic Chemistry, chemistry.chemical_compound, Deprotonation, chemistry, Amide, Organometallic Compounds, Tris(pentafluorophenyl)borane, Lewis acids and bases, Physical and Theoretical Chemistry, Boranes
Abstract

The phosphinoborane adduct H(3)P x B(C(6)F(5))(3) can be deprotonated using LiN(SiMe(3))(2) to give the phosphidoborate salt Li[H(2)PB(C(6)F(5))(3)], which was converted to the phosphidodiborates Li[H(2)P{B(C(6)F(5))(3)}(2)] and Li[H(2)P{B(C(6)F(5))(3)}{BH(3)}] by treatment with an equivalent of B(C(6)F(5))(3) or Me(2)S.BH(3), respectively. A series of anions of the form [RR'P{M(C(6)F(5))(3)}{BH(3)}](-), where R = R' = Ph or R= (t)Bu, R' = H, and M = B or Al, were prepared (through treatment of salts Li[RR'P(BH(3))] with the corresponding Lewis acid) and characterized using multinuclear NMR, elemental analysis and X-ray crystallography. The solid state structures of [Li(Et(2)O)(x)][Ph(2)P{M(C(6)F(5))(3)}{BH(3)}] exhibit eta(2)-bonding of the BH(3) group to the cationic lithium center. The attempted preparation of an analogous series with amide cores of the form [R(2)N{B(C(6)F(5))(3)}{BH(3)}](-) proved unsuccessful; among the competing reaction pathways hydride abstraction occurred preferentially to yield Li[HB(C(6)F(5))(3)] and dimers or higher oligomers with the composition (R(2)NBH(2))(n).

Published
2009
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3. Mononuclear Ti[triple bond]N complexes formed by the facile multiple deprotonation of H3N x B(C6F5)3: the importance of chloride ligands

Author

Anna-Marie, Fuller, William, Clegg, Ross W, Harrington, David L, Hughes, and Simon J, Lancaster

Abstract

The crystalline ion-pair [TiCl(NMe(2))(2)(NMe(2)H)(2)](+)[TiCl(2){NB(C(6)F(5))(3)}(NMe(2)H)(2)](-), in which the anion has a triply bonded nitridoborate ligand, is formed through the multiple activation of H(3)N x B(C(6)F(5))(3) when treated with [Ti(NMe(2))(3)Cl].

Published
2008

5. The synthesis, molecular structure and supramolecular architecture of complexes between the ammonia adduct of tris(pentafluorophenyl)boron and a series of mono and polydentate hydrogen-bond acceptorsCCDC reference numbers 688045–688055. For crystallographic data in CIF or other electronic format see DOI: 10.1039/b808208a

Author

Anna-Marie Fuller, Andrew J. Mountford, Simon J. Coles, Peter N. Horton, David L. Hughes, Michael B. Hursthouse, Louise Male, and Simon J. Lancaster

Subjects
*COMPLEX compounds synthesis, *SUPRAMOLECULAR chemistry, *MOLECULAR structure, *AMMONIA, *HYDROGEN bonding, *CRYSTALLIZATION, *TETRAHYDROFURAN
Abstract

The ammonia adduct of tris(pentafluorophenyl)boron, (C6F5)3B·NH3, is a potentially tri-functional hydrogen-bond donor. Co-crystallisation with the bases acetonitrile, pyridine, tetrahydrofuran, tetramethylethylenediamine, 15-crown-5, 1,4-diazabicyclo[2.2.2]octane (DABCO), pyrazine and 4,4′-bipyridine results, not in donor exchange, but in the formation of supermolecules assembled through hydrogen bonding to second coordination sphere acceptors. The complexes have been characterised by elemental analysis, multinuclear NMR and single-crystal diffraction methods. The solid-state architectures range in complexity, from the hydrogen bonded pairing of (C6F5)3B·NH3, with a single monodentate acceptor molecule (e.g.MeCN to form (C6F5)3B·NH3·NCMe), through complexation with all three N–H groups to the macrocycle 15-crown-5, to the formation of infinite one-dimensional chains with pyrazine and DABCO, and to two-dimensional networks with the divergent acceptor 4,4′-bipyridine. [ABSTRACT FROM AUTHOR]

Published
2008
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6. The hafnium-mediated NH activation of an amido-boraneElectronic supplementary information (ESI) available: Compounds 1–4, ORTEP figures for 1and 2, a table of hydrogen bonds for 3, a 1H NMR spectrum of the crude reaction mixture for 4, synthetic details for compounds 1, 2and 3. CCDC 814619–814622. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c1cc11320h

Author

Elizabeth A. Jacobs, Anna-Marie Fuller, Simon J. Lancaster, and Joseph A. Wright

Subjects
*HAFNIUM, *BORANES, *TOLUENE, *SOLUTION (Chemistry), *AMMONIA, *LITHIUM compounds, *CRYSTALLOGRAPHY
Abstract

Treatment of Cp2HfCl2with two equivalents of LiNH2BH(C6F5)2in toluene solution yields Cp2Hf{NHBH(C6F5)2}, which has been crystallographically characterised. The otherwise base-free [NHBH(C6F5)2] complex is stabilised by an agostic interaction. [ABSTRACT FROM AUTHOR]

Published
2011
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7. Mononuclear TiN complexes formed by the facile multiple deprotonation of H3N·B(C6F5)3: the importance of chloride ligandsElectronic supplementary information (ESI) available: ORTEP view of 3. CCDC 696254. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/b812785a

Author

Anna-Marie Fuller, William Clegg, Ross W. Harrington, David L. Hughes, and Simon J. Lancaster

Subjects
*TITANIUM nitride, *METAL complexes, *PROTON transfer reactions, *LIGANDS (Chemistry), *CRYSTALLOGRAPHY, *ELECTRONIC information resources
Abstract

The crystalline ion-pair [TiCl(NMe2)2(NMe2H)2]+[TiCl2{NB(C6F5)3}(NMe2H)2]−, in which the anion has a triply bonded nitridoborate ligand, is formed through the multiple activation of H3N·B(C6F5)3when treated with [Ti(NMe2)3Cl]. [ABSTRACT FROM AUTHOR]

Published
2008
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