Unidentate dithiocarbamate complexes of rhodium and iron: dithiocarbamate and dithiocarbonate complexes of ruthenium

Abstract

The interaction of sodium dimethyldithiocarbamate with acetone solutions of chlorotris(triphenylphosphine)rhodium(I) and trans-chlorocarbonylbis(triphenylphosphine)rhodium(I) leads to the new complexes Rh^I(S₂CNMe₂)(PPh₃)₂, Rh^I(S₂CNMe₂)(CO)PPh₃, Rh^III(S₂CNMe₂)₃(PPh₃), and Rh^III(S₂CNMe₂)₃(CO)PPh₃. I.r. and n.m.r. spectra of the last two complexes suggest the presence of a unidentate dithiocarbamate group.

From chlorodicarbonyl-π-cyclopentadienyl-iron(II) a similar unidentate complex (π-C₅H₅)Fe(CO)₂(S₂CNMe₂) has been obtained.

Dichlorotris(triphenylphosphine)ruthenium(II) reacts with sodium dimethyldithiocarbamate, the corresponding diethyl and diphenyl salts, and also sodium O-methyl and -ethyl dithiocarbonates to form ruthenium(II) chelate complexes of the type Ru(Me₂NCS₂)₂(PPh₃)₂ and Ru(MeOCS₂)₂(PPh₃)₂.