Binuclear Complexes of Pt(II) with Platinated 2-Phenylbenzothiazole and Bridged Derivatives of Pyridin- and Benzothiazol-2-thiols

Binuclear complexes of Pt(II) cycloplatinated with 2-phenylbenzothiazole and bridging ligands have been shown to contain the Pt-Pt bond. The complexes have been studied by X-ray diffraction, H-1 NMR and electronic absorption spectroscopy, and electrochemical methods. The complexes cis-N-(bt), S-isomers with antisymmetric positions of the cyclometalated and the bridging ligands have been detected in the crystals as well as in the solutions. The low-wavelength absorption and luminescence of the complexes have been assigned to the metal-metal-ligand charge transfer. The two-electron oxidation and reduction waves in the voltamperograms are associated with the metal-and the ligand-centered processes, respectively.