SYNTHESIS AND CHARACTERIZATION OF METHYLPLATINUM(II) 0,0'-DIALKYL DITHIOPHOSPHATES - CRYSTAL-STRUCTURE OF [PTME(S2P(OPRI)2)(ASPH3)]

Methylplatinum(II) O,O'-dialkyl dithiophosphates of the type [PtMe{S2P (OR)2}L] and [PtMe{S2P(OR)2}(L-L)] [R = Et or Pr(i); L = PPh3, P(C6H4M e-p)3, P(OPh)3 or AsPh3; L-L = Ph2PCH2CH2PPh2 or Ph2PCH2CH2AsPh2] have been synthesized. They were characterized by elemental analyses and N MR (H-1 and P-31) data. A single-crystal X-ray structure determination of [PtMe{S2P(OPr(i))2}(AsPh3)] has established a chelated dithiophosp hate ligand moiety. The four-membered metallacyclic PtS2P ring is plan ar.