Conformational analysis of 1, 1, 2, 2-tetraaryl-disilanes

SG Baxter, K Mislow, JF Blount

Index: Baxter, S. G.; Mislow, Kurt; Blount, John F. Tetrahedron, 1980 , vol. 36, # 2 p. 605 - 616

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Citation Number: 25

Abstract

A study of the static stereochemistry of 1, 1, 2, 2-tetraphenyldisilane (1) and 1, 1, 2, 2- tetramesityldisilane (2) by empirical force field calculations, X-ray diffraction, and 1H NMR reveals that the preference for the anti conformation, exhibited by the unclamped 1, 1, 2, 2- tetraarylethanes, is sustained in the analogous disilanes, although in somewhat attenuated form. This anti preference stands in contrast to the gauche preference of 1, 1, 2, 2- ...