Synthesis and chemistry of 2-pyridyl(phosphine) complexes of platinum(0)

Article abstract of DOI:10.1016/0022-328X(91)80178-M

The complexes tetrakisplatinum(0), 1, and tris<2-(diphenylphosphino)pyridine>platinum(0), 2, are synthesized, and characterized by 31P<1H> and 195Pt<1h> NMR spectroscopy.The reactions of 1 and 2 with olefins (ethylene, maleic anhydride, diethyl maleate, and olefinic nitriles) are studied and some square-planar Pt(PR3)2(η²-olefin) species isolated (PR3 = the pyridylphosphine).No olefin hydration products are observed on heating the olefin complexes in aqueous solution.Oxidative addition of MeI to 1 and 2 gives the trans-PtI(Me)(PR3)2 species.However, the trans-Pt(H)Cl(PR3)2 species is isolated only from reaction of 2 with gaseous HCl; the hydride reacts with acrylonitrile to form cis-PtCl(CH2CH2CN)(PR3)2.