The shape of pentaphenylantimony and pentaphenylarsenic in solution

Abstract

From a detailed study of the vibrational spectra of pentaphenylantimony and pentaphenylarsenic it is suggested that the compounds are respectively square pyramidal and trigonal bipyramidal in solution. ¹³C Resonance spectroscopy on solutions of pentaphenylantimony at room temperature show the phenyl rings to be magnetically equivalent. Proton magnetic resonance on solutions of pentaphenylantimony which had been fully deuteriated n the meta and para positions showed only one line, which broadened as the temperature was lowered to –140°.