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Start Over Author "Dittrich, Birger" Journal journal of the american chemical society
23 results on '"Dittrich, Birger"'

3. Organosilicon Radicals with Si–H and Si–Me Bonds from Commodity Precursors

Author

Kundu, Subrata, Samuel, Prinson P., Sinhababu, Soumen, Luebben, Anna V., Dittrich, Birger, Andrada, Diego M., Frenking, Gernot, Stückl, A. Claudia, Schwederski, Brigitte, Paretzki, Alexa, Kaim, Wolfgang, and Roesky, Herbert W.

Abstract

The cyclic alkyl(amino) carbene (cAAC) stabilized biradicals of composition (cAAC)2SiH2(1), (cAAC)SiMe2-SiMe2(cAAC) (2), and (cAAC)SiMeCl-SiMeCl(cAAC) (3) have been isolated as molecular species. All the compounds are stable at room temperature for more than 6 months under inert conditions in the solid state. All radical species were fully characterized by single-crystal X-ray structure analysis and EPR spectroscopy. Furthermore, the structure and bonding of compounds 1–3have been investigated by theoretical methods. Compound 1contains the SiH2moiety and this is the first instance, where we have isolated 1without an acceptor molecule.

Published
2024
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6. Organosilicon Radicals with Si–H and Si–Me Bonds from Commodity Precursors

Author

Kundu, Subrata, primary, Samuel, Prinson P., additional, Sinhababu, Soumen, additional, Luebben, Anna V., additional, Dittrich, Birger, additional, Andrada, Diego M., additional, Frenking, Gernot, additional, Stückl, A. Claudia, additional, Schwederski, Brigitte, additional, Paretzki, Alexa, additional, Kaim, Wolfgang, additional, and Roesky, Herbert W., additional

Published
2017
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9. Carbene Supported Dimer of Heavier Ketenimine Analogue with P and Si Atoms

Author

Roy, Sudipta, primary, Dittrich, Birger, additional, Mondal, Totan, additional, Koley, Debasis, additional, Stückl, A. Claudia, additional, Schwederski, Brigitte, additional, Kaim, Wolfgang, additional, John, Michael, additional, Vasa, Suresh Kumar, additional, Linser, Rasmus, additional, and Roesky, Herbert W., additional

Published
2015
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14. One-Electron-Mediated Rearrangements of 2,3-Disiladicarbene

Author

Mondal, Kartik Chandra, primary, Samuel, Prinson P., additional, Roesky, Herbert W., additional, Aysin, Rinat R., additional, Leites, Larissa A., additional, Neudeck, Sven, additional, Lübben, Jens, additional, Dittrich, Birger, additional, Holzmann, Nicole, additional, Hermann, Markus, additional, and Frenking, Gernot, additional

Published
2014
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15. Isolation of Neutral Mononuclear Copper Complexes Stabilized by Two Cyclic (Alkyl)(amino)carbenes

Author

Weinberger, David S., primary, Amin SK, Nurul, additional, Mondal, Kartik Chandra, additional, Melaimi, Mohand, additional, Bertrand, Guy, additional, Stückl, A. Claudia, additional, Roesky, Herbert W., additional, Dittrich, Birger, additional, Demeshko, Serhiy, additional, Schwederski, Brigitte, additional, Kaim, Wolfgang, additional, Jerabek, Paul, additional, and Frenking, Gernot, additional

Published
2014
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22. Photochemical C( sp )-C( sp 2 ) Bond Activation in Phosphaalkynes: A New Route to Reactive Terminal Cyaphido Complexes L n M-C≡P.

Author

Görlich T, Frost DS, Boback N, Coles NT, Dittrich B, Müller P, Jones WD, and Müller C

Abstract

The photochemical activation of the C( sp )-C( sp 2 ) bond in Pt(0)-η 2 -aryl-phosphaalkyne complexes leads selectively to coordination compounds of the type L n Pt(aryl)(C≡P). The oxidative addition reaction is a novel, clean, and atom-economic route for the synthesis of reactive terminal Pt(II)-cyaphido complexes, which can undergo [3 + 2] cycloaddition reactions with organic azides, yielding the corresponding Pt(II)-triazaphospholato complexes. The C-C bond cleavage reaction is thermodynamically uphill. Upon heating, the reverse and quantitative reductive elimination toward the Pt(0)-phosphaalkyne-π-complex is observed.

Published
2021
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23. Geometric Complementarity in Assembly and Guest Recognition of a Bent Heteroleptic cis-[Pd 2 L A 2 L B 2 ] Coordination Cage.

Author

Bloch WM, Abe Y, Holstein JJ, Wandtke CM, Dittrich B, and Clever GH

Abstract

Due to the inherent difficulties in achieving a defined and exclusive formation of multicomponent assemblies against entropic predisposition, we present the rational assembly of a heteroleptic [Pd 2 L A 2 L B 2 ] 4+ coordination cage achieved through the geometric complementarity of two carefully designed ligands, L A and L B . With Pd(II) cations as rigid nodes, the pure distinctly angular components readily form homoleptic cages, a [Pd 2 L A 4 ] 4+ strained helical assembly and a [Pd 4 L B 8 ] 8+ box-like structure, both of which were characterized by X-ray analysis. Combined, however, the two ligands could be used to cleanly assemble a cis-[Pd 2 L A 2 L B 2 ] 4+ cage with a bent architecture. The same self-sorted product was also obtained by a quantitative cage-to-cage transformation upon mixing of the two homoleptic cages revealing the [Pd 2 L A 2 L B 2 ] 4+ assembly as the thermodynamic minimum. The structure of the heteroleptic cage was examined by ESI-MS, COSY, DOSY, and NOESY methods, the latter of which pointed toward a cis-conformation of ligands in the assembly. Indeed, DFT calculations revealed that the angular ligands and strict Pd(II) geometry strongly favor the cis-[Pd 2 L A 2 L B 2 ] 4+ species. The robust nature of the cis-[Pd 2 L A 2 L B 2 ] 4+ cage allowed us to probe the accessibility of its cavity, which could be utilized for shape recognition toward stereoisomeric guests. The ability to directly combine two different backbones in a controlled manner provides a powerful strategy for increasing complexity in the family of [Pd 2 L 4 ] cages and opens up possibilities of introducing multiple functionalities into a single self-assembled architecture.

Published
2016
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