COORDINATION-COMPOUNDS OF PT(II) AND PD(II) WITH IMIDAZOLE AS A LIGAND - NEW SYNTHETIC PROCEDURES AND CHARACTERIZATION

The synthesis and characterization of a number of new coordination compounds of Pt(II) and Pd(II) with the nitrogen-donor ligand imidazole (IzH) is described. These compounds are cis-Pt(IzH)2X2 trans-Pt(IzH)2X2, Pt(IzH)4X2, trans Pd(IzH)2X2, Pd(IzH)4X2 where X = Cl, Br or I and Pt(IzH)4PtX4, Pd(IzH)4PdX4, where X = Cl or Br, and cis-Pd- (IzH)2X2 where X = Cl, Br or X2 = C2O4, as well as Pt(IzH)2(Iz)2 and Pd(Iz)2 where Iz is the imidazolato anion. The new compounds are characterized by chemical analyses, X-ray powder diffraction photographs, vibrational spectroscopy (infrared- and far- infrared spectroscopy) and proton nuclear magnetic resonance. The metal(II) ions are in all cases coordinated in a square-planar geometry. In Pd(Iz)2 a polymeric structure exists with bidentate, bridging imidazolato anions. © 1979.