An analysis of the band envelopes of the trans and gauche tin-carbon stretching frequencies

Abstract

An attempt has been made to explain the apparent absence of symmetric and asymmetric components in the absorption bands of the tin-carbon stretching frequencies of certain alkyltin compounds. Although the number of possible conformations increases with degree of alkyl substitution on the tin atom, results indicate that certain conformations are preferred. Although in the crystalline state the stable conformation is trans, it is shown that on successive replacement of alkyl groups by chlorine atoms it is the gauche form that is preferred, although never exclusively.