COMPLEXES OF NICKEL(II), PALLADIUM(II) AND PLATINUM(II) WITH 2,6-BIS(MERCAPTOMETHYL)PYRIDINE

2,6-Bis (mercaptomethyl)pyridine (H(2)L) and its binuclear nickel(II), palladium(II) and platinum(II) complexes, containing the dianion as a bridging ligand, were prepared and characterized by physicochemical a nd spectroscopic data. Square-planar geometries are proposed for these divalent metal complexes. Cyclic voltammetry of Ni(2)L(2) in DMSO sho ws a reversible one-electron reduction wave at -1.48 V vs a Ag/AgBF4 r eference electrode. Quantitative reduction of this complex by controll ed potential electrolysis at -1.80 V yielded the corresponding Ni-I pr oduct as shown by ESR spectroscopy. (C) 1997 Elsevier Science Ltd.