DINUCLEAR AND TETRANUCLEAR GOLD(II) COMPLEXES WITH DITHIOCARBAMATE AND RELATED LIGANDS - X-RAY STRUCTURE OF [AU2(MU-CH2PPH2CH2)2(S2CNME2)2]

The reaction of [Au2(mu-CH2PPh2CH2)2(tht)2](ClO4)2 or [Au2(mu-CH2PPh2CH2)2(PPh3)(tht)](ClO4)2 (tht = tetrahydrothiophene) with various dithiocarbamates gives the cationic or neutral complexes [Au2(mu-CH2PPh2CH2)2{S(MeS)CNHR}2](ClO4)2, [Au2(mu-CH2PPh2CH2)2(PPh3){S(Mes)CNHR}](ClO4)2 or [Au2(mu-CH2PPh2CH2)2(S2CNR2)2]. Displacement of tht from [Au2(mu-CH2PPh2CH2)2(R')(tht)](ClO4) (R' = C6F5 or 2,4,6-C6F3H2) gives new cationic tetranuclear complexes [{Au2(mu-CH2PPh2CH2)2(R')}2(mu-S2CNR2)](ClO4) in which the dithiocarbamate acts as a bridging ligand. The structure of [Au2(mu-CH2PPh2CH2)2(S2CNMe2)2] has been established by an X-ray diffraction study and shows that the dithiocarbamate is unidentate.