SYNTHESIS AND CHARACTERIZATION OF BINUCLEAR ARYLTHIOLATO-BRIDGED AND PHENYLSELENOLATO-BRIDGED ORGANOPLATINUM(II) COMPLEXES - CRYSTAL-STRUCTURE OF [PT2PH2(MU-SPH)2(PME2PH)2]

Binuclear organoplatinum(II) complexes of the type [Pt2Ar2(mu-EAr')2(PR3)2] (Ar = Ph or p-tol; E = S or Se; Ar'= Ph or p-tol; PR3 = PPr3 PBu3 or PMe2Ph) have been synthesized and characterized by elemental analysis and nuclear magnetic resonance (H-1 and P-31) spectroscopy. Some of these complexes were isolated exclusively as the trans isomer, but others were present at a mixture of cis and trans isomers. An X-ray diffraction study of [Pt2Ph2(mu-SPh)2(PMe2Ph)2] has shown that it has sym-trans geometry, with a planar four-membered Pt2S2 ring.