Cyclometalated organoplatinum(ii) complexes: First example of a monodentate benzo[h]quinolyl ligand and a complex with bridging bis(diphenylphosphino) ethane

摘要

The cyclometalated complexes [Pt(ppy)R(SMe_2)] or [Pt(bhq)R(SMe_2)], where ppyH = 2-phenylpyridine, bhqH = benzo[h]quinoline and R = methyl or p-tolyl, react with bis(diphenylphosphino) ethane, dppe, in a 1:1 ratio to give the corresponding complexes [Pt(κ~1-C-ppy)R(dppe)] or [Pt(κ~1-C-bhq)R(dppe)], in which the ppy or bhq ligands are monodentate and dppe is chelating. The similar reaction in a 2:1 ratio gives the binuclear complexes [{Pt(ppy)R} _2(μ-dppe)] or [{Pt(bhq)R}_2(μ-dppe)], in which the dppe ligands are in the unusual bridging bidentate bonding mode.