SYNTHESIS AND STRUCTURE OF TETRA- AND TRI-P-TOLYLANTIMONY BENZOATES

Abstract

Tetra-p-tolylantimony (I) benzoate has been obtained by interaction of penta-p-tolylantimony with benzoic acid or dibenzoate tri-p-tolylantimony in toluene. Tri-p-tolylantimony (II) dibenzoate has been synthesized by the oxidative addition reaction of tri-p-tolylantimony and benzoic acid in ether, in the presence of tret-butyl hydroperoxide. X-ray diffraction analysis of I and II has shown that the coordination of antimony atoms is trigonal-bipyramidal with the oxygen atom of the carboxyl groups
in the axial positions, and intramolecular contacts between the carbonyl oxygen atoms and the central atom are present.