ORGANOLEAD DERIVATIVES OF COORDINATIVELY SATURATED PLATINUM(II) OLEFIN COMPLEXES - MOLECULAR-STRUCTURE OF [PTCL(PBPH(2)CL)(2,9-DIMETHYL-1,10-PHENANTHROLINE)(DIMETHYL MALEATE)] AND ITS DEPLUMBATION PRODUCT [PTCL(PH)(2,9-DIMETHYL-1,10-PHENANTHROLINE)(DIMETHYL MALEATE)]

The stabilization of Pt(II)-PbR(2)Cl linkages (R = Me, Ph) is reported. The compounds of general formula [PtCl(PbR(2)Cl)(N-N)(olefin)] (N-N = 2,9-dimethyl-1,10-phenanthroline (dmphen) and 6-methylpyridine-2-phenylimine (pimpy)) have been obtained through the oxidative addition of PbMe(2)Cl(2) and PbPh(2)Cl(2) to three-coordinate Pt(O) complexes [Pt(N-N)(olefin)]. In the presence of less hindered N-N ligands (e.g., 2-methyl-1,10-phenanthroline) the addition leads only to the isolation of the mononuclear Pt(LI) complexes [PtCl(R)(N-N)]. The molecular structure of [PtCl(PbPh(2)Cl)(dmphen)(dimethyl maleate)] has shown that the Pt-Pb bond is stabilized by an additional interaction of a carboxylate oxygen to the lead atom. The deplumbation product [PtCl(Ph)(dmphen)(dimethyl maleate)] has also been characterized by X-ray crystallography.