Synthesis and characterization of O-methyldithiocarbonate and triphenylphosphoniodithiocarboxylate complexes containing a tris(pyrazolyl)borato (Tp) ligand

The O-methyldithiocarbonate and triphenylphosphoniodithiocarboxylate complexes having a Tp ligand (Tp = BH(pyrazol-1-yl)3) were prepared. The CS2 insertion of ruthenium chloride complex Tp(PPh3)2Ru–Cl (1) in the presence of CH3OH resulted in the O-methyldithiocarbonate complex Tp(PPh3)Ru(κ2-S2COCH3) (3) and triphenylphosphoniodithiocarboxylate complex [Tp(PPh3)Ru(κ2-S2CPPh3)]Cl (4) with the zwitterion image as a chelating ligand depending on the reaction conditions. Attractively, this outcome contrasts sharply with similar reaction of carbon disulfide with Cp(PPh3)2Ru–Cl, no reaction is observed, even under drastic, vigorous conditions. The structures of 3 and 4 have been determined by X-ray diffraction analysis.