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 CS 2 insertion of ruthenium chloride complex Tp(PPh 3 ) 2 Ru–Cl ( 1 ) in the presence of CH 3 OH resulted in the O -methyldithiocarbonate complex Tp(PPh 3 )Ru(κ 2 -S 2 COCH 3 ) ( 3 ) and triphenylphosphoniodithiocarboxylate complex [Tp(PPh 3 )Ru(κ 2 -S 2 CPPh 3 )]Cl ( 4 ) with the zwitterion - S 2 CPPh 3 + as a chelating ligand depending on the reaction conditions. Attractively, this outcome contrasts sharply with similar reaction of carbon disulfide with Cp(PPh 3 ) 2 Ru–Cl, no reaction is observed, even under drastic, vigorous conditions. The structures of 3 and 4 have been determined by X-ray diffraction analysis.