Some group VB chloride complexes with thiourea and N,N′-diethyl-dithiooxamide

Abstract

The following complexes of thiourea(tu) and N,N′-diethyl-dithioxamide (Et2DH2) with phosphorous (III), arsenic(III), antimony(III) and bismuth(III) have been prepared and characterises: PCl3(tu) (DMF)2; AsCl3(tu)3(DMSO)3: MCl3(tu)3 (M = As, Bi); SbCl3(tu)2(DMF) and SbCl3(Et2DH2)1.5 (C2H4Cl2). IR and NMR (1H, 13C and 31P) spectral data provides evidence for ligand attachment exclusively by sulphur coordination in all complexes excepting PCl3(tu) (DMF)2. For the latter additional metal-nitrogen bonding is proposed.