Acta Cryst. (2008). E64, o1950  [ doi:10.1107/S1600536808028808 ]

(S)-1,2-Dimethyl-1,1,2-triphenyl-2-(4-piperidiniomethyl)disilane chloride

C. Däschlein, V. H. Gessner and C. Strohmann

Abstract: The title compound, C₂₆H₃₄NSi₂⁺·Cl^-, shows chirality at silicon. Because of its highly selective synthesis with an e.r. of >99:1 by means of a racemic resolution with mandelic acid, the free disilane is of great importance to the chemistry of highly enantiomerically enriched lithiosilanes and their trapping products. N-HCl hydrogen bonding is present between the protonated nitrogen atom of the piperidino group and the chloride counter-anion. The silicon-silicon distance as well as silicon-carbon and carbon-nitrogen bond lengths are in the same ranges as in other quaternary, functionalized di- and tetrasilanes.

Online 17 September 2008

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