Antimony (III) orbital population analysis using antimony-121 Mössbauer data

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Abstract
A method of orbital population analysis which utilizes both Mössbauer isomers shifts and quadrupole coupling constants has been developed for Sb(III) compounds. A linear relationship between the isomer shift δ and number of s electrons ns is inadequate for Sb(III) and an empirical quadratic equation has been developed. The electron population along the Sb–L bond σL is calculated for a number of unsymmetric stibines of the type R2R′Sb and RR′2Sb, where R=phenyl and R′=methyl, vinyl, allyl, and propyl, as well as for some Sb(III) oxides.