Preparation, properties, and X-ray crystal structure of tris(O,O′-di-isopropyl phosphorodithioato)iron(III), [Fe{S2P(OPri)2}3]. Comparison of structure and bonding in phosphorodithioato- and dithiocarbamato-complexes

Abstract

The title compound [Fe{S₂P(OPrⁱ)₂}₃] has been prepared by a method which gives a stable product. The structure, determined by single-crystal X-ray diffraction, is distorted octahedral. The iron(III) is high-spin. The i.r., u.v.–visible, and e.s.r. spectra are reported. For complexes [ML₃](L = phosphorodithioate or dithiocarbamate) distortions from octahedral geometry, metal–sulphur bond lengths, and covalent contributions to the metal–sulphur bond are discussed.