Dithiafulvenylphosphine as P- and P,S-ligand towards metal carbonyl fragments

The ability of the dithiafulvenylphosphine (P-DTF) to react as a monodentate (P) or a bidentate (P,S) ligand with metal carbonyl complexes such as Mo(CO)6 and MnBr(CO)5 is presented. A series of metal carbonyl complexes are synthesised and characterised by IR, 1H NMR and 31P NMR spectroscopy. X-ray crystallographic analyses on the Mo(CO)5(P-DTF) and Mo(CO)4(P,S-DTF) complexes are reported together with the structural investigations on the dithiafulvenes precursors. The electrochemical properties of the various complexes investigated by cyclic voltammetry are discussed.