1, 2-Diiododisilane and 1, 1, 2, 2-tetraiododisilane: gas-phase molecular structure and conformational composition as determined by electron diffraction

…, K Hagen, R Stølevik, K Hassler, M Pöschl

Index: Roehmen, Eirik; Hagen, Kolbjoern; Stoelevik, Reidar; Hassler, Karl; Poeschl, M. Journal of Molecular Structure, 1991 , vol. 244, p. 41 - 49

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Citation Number: 22

Abstract

Abstract The molecular structures of 1, 2-diiododisilane (DIDS) at 55 C and 1, 1, 2, 2,- tetraiododisilane (TIDS) at 155 C have been studied using gas-phase electron diffraction data. These molecules exist as mixtures of anti and gauche conformers. The observed conformational compositions were (percentage of gauche): 76 (16)% for DIDS, and 60 (29%) for TIDS. Assuming ΔS= R ln 2, the conformational energy differences δE (gauche ...