A disilene base adduct with a dative Si–Si single bond.

Schweizer, J. I.; Scheibel, M. G.; Diefenbach, M.; Neumeyer, F.; Wîrtele, C.; Kulminskaya, N.; Linser, R.; Auner, N.; Schneider, S.; Holthausen, M. C.

doi:10.1002/ange.201510477

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A disilene base adduct with a dative Si–Si single bond.

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Kulminskaya, N.
Research Group of Solid-State NMR-2, MPI for Biophysical Chemistry, Max Planck Society;

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Linser, R.
Research Group of Solid-State NMR-2, MPI for Biophysical Chemistry, Max Planck Society;

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Citation

Schweizer, J. I., Scheibel, M. G., Diefenbach, M., Neumeyer, F., Wîrtele, C., Kulminskaya, N., et al. (2016). A disilene base adduct with a dative Si–Si single bond. Angewandte Chemie, 128(5), 1814-1818. doi:10.1002/ange.201510477.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-1CD0-3

Abstract

An experimental and theoretical study of the base- stabilized disilene 1 is reported, whichforms at lowtemper- atures in the disproportionation reaction of Si 2 Cl 6 or neo- Si 5 Cl 12 with equimolar amounts of NMe 2 Et. Single-crystal X- ray diffraction and quantum-chemical bonding analysis dis- close an unprecedented structure in silicon chemistry featuring adative Si!Si single bond between two silylene moieties, Me 2 EtN!SiCl 2 !Si(SiCl 3 ) 2 .The central ambiphilic SiCl 2 group is linked by dative bonds to the amine donor and the bis(trichlorosilyl)silylene acceptor,which leads to push–pull stabilization. Based on experimental and theoretical examina- tions aformation mechanism is presented that involves an autocatalytic reaction of the intermediately formed anion Si(SiCl 3 ) 3 ¢ with neo-Si 5 Cl 12 to yield 1.