Stereochemically nonrigid silanes, germanes, and stannanes. 9. Chiral silylcyclopentadienes and related compounds: mechanistic and stereochemical definition of …

A Bonny, RD Holmes-Smith, G Hunter…

Index: Bonny,A.; Holmes-Smith,D.; Hunter,G. Journal of the American Chemical Society, 1982 , vol. 104, p. 1855

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Citation Number: 17

Abstract

Abstract: Chirality at the Si atom in the silylcyclopentadienes C5H5Si* H (R) C1 (R= Me, n- Bu, or Me3SiCH2) and CSHSSi* H (i-Pr)(Me) results in anisochronicity among both pairs of olefinic ring nuclei (C2v5 and C3s4) in slow-limit" C NMR spectra. The larger diastereotopic shift is attributed in each system to that between those nuclei nearest to the chiral Si center, Le., C2 and C5. With increasing temperature the pair of resonances so distinguished ...