Dialkyldithiocarbamate derivatives of toluene-3,4-dithiolato arsenic(III) and -bismuth(III): synthetic, spectral and single crystal X-ray structural studies

We report here on dialkyldithiocarbamates complexes of the type [C6H3(CH3)S2MS2CNR2] (M = As and Bi: R = CH3, C2H5, and CH2-CH2), prepared by the reaction of toluene-3,4-dithiolatoarsenic(III) and -bismuth(III) chlorides [C6H3(CH3)S2MCl] (M = As and Bi) with sodium/ammonium salts of dialkyldithiocarbamates [XS2CNR2] (X = Na and NH4: R = CH3, C2H5and CH2-CH2). The new derivatives were characterized by melting point, elemental analysis (C, H, N, S and As/Bi) and spectroscopic studies (IR,1H and13C NMR). Single crystal X-ray diffraction analyses of toluene-3.4-dithiolatoarsenic(III) dimethyldithiocarbamate and toluene-3,4-dithiolatoarsenic(III) pyrrolidine-dithiocarbamate revealed a monodentate chelating mode of the dimethyl as well as the pyrrolidine-dithiocarbamate moieties in these complexes.