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Synthesis, crystal and molecular structure, electronic spectra in solution and in the solid state, electrochemical properties, the mass spectrum, and lH, 13C, and lg5Pt NMR spectra as well as some results on the reactivity of cis-Ptll(Phpy)z (I), Cz2H16NzPt, are reported (Phpy-= deprotonated 2-phenylpyridine). The complex is prepared from t r~n r -P t C I~S E t~)~ and 2-(2'-lithiophenyl)pyridine. The molecular structure reveals a pure cis form with bowlike distortions of the Phpy-ligands.In the crystal (space group monoclinic R 1 / n , a = 12.339 (2) A, b = 11.790 (2) A, c = 11.788 (3) A, /3 = 106.02 (2)O, Z = 4, d = 2.029 g cm"; diffractometer measurements, full-matrix least-square refinements, final R = 0.02, R, = 0.023) distances are Pt-N = 2.13 A and Pt-C = 1.99 A. The molecules are associatqd to dimeric units with essentially parallel planes at a distance of 3.37 A. The Pt-Pt distance in the dimer is 3.53 A. A thermal motion analysis is reported. Electronic spectra feature a strong absorption band around 400 nm ( E N lOOOO), whose position depends on the solvent. No indication of molecular association is found in solution. The solid emits strongly in the range 500-600 nm at room temperature. cis-Pt(Phpy), reacts with Br, in an oxidative-addition reaction to PtBr2(Phpy)z.