Oxidation of tri(o-tolyl)antimony by tert-butyl hydroperoxide. molecular structures of bis[µ2-oxo- tri(O-tolyl)antimony] and µ2-oxo-bis[(tert-butylperoxy)tri(o-tolyl)antimony]

Abstract

Tri(o-tolyl)antimony oxidation by equimolar amount of tert-butyl hydroperoxide in diethyl ether led to the formation of bis[µ 2-oxo-tri(o-tolyl)antimony] (1). At the molar ratio of reactants 1:2 or 1:4 µ 2-oxo-bis[(tert-butylperoxy)tri(o-tolyl)antimony] (2) has been formed. According to the X-ray analysis data, antimony atoms are in the trigonal bipyramidal coordination in molecules 1 and 2. The bond lengths SbO vary within the ranges 1.937(2)2.078(2) Å (1) and 1.975(17)2.216(15) Å (2). Keywords: tri(ortho-tolyl)antimony, tert-butyl hydroperoxide, oxidation, bis[µ 2-oxotri(o-tolyl)antimony], µ 2-oxo-bis[(tert-butylperoxy)tri(o-tolyl)antimony], molecular structures, X-ray analysis.