o,o′-Alkylene dithiophosphato complexes of vanadium(IV) and vanadium(V)

Reactions of VO(acac)(2) with alkylene dithiophosphoric acids, POGOS(2)H, and of VOCl3 with the ammonium salts NH4(POGOS(2)) in 1: 2 molar ratio gave the oxovanadium(IV) alkylene dithiophosphates, [VO( POGOS(2))(2)], and monochloroxovanadium(V) alkylene dithiophosphates, [VOCl(POGOS(2))(2)], respectively, where G = -CH2CMe2- CH2-, -CH2CEt2CH2-, -CHMeCH(2)CMe2- or -CMe2CMe2-. These complexes are green solids, soluble in common organic solvents and sensitive to moisture. They were characterized by elemental analysis, molecular weight and spectral studies including i.r. and n.m.r. (H-1, C-13 and P-31), which suggested bidentate bonding of the POGOS(2) ligands to give a square pyramidal for the V-IV complexes and an octahedral geometry for the V V complexes.