Physical studies of complexes of Co(II), Ni(II) and Zn(II) with strong field thiolate ligands as well as the Ni(II) Derivative of azurin. Evidence that the protein constrains the stereochemistry about the metal in azurin

Novel Thiosalamo Ligand as a Remarkably Stable N2S2 Salen-Type Chelate and Synthesis of a Nickel(II) Complex

Novel N2S2 tetradentate chelate ligand H2tsalamo, which contains both thiol groups and C=N moieties, was synthesized as a remarkably stable compound. Complexation between H2tsalamo and nickel(II) acetate gave a square planar complex [Ni(tsalamo)] as dark brown crystals, whose structure was determined by X-ray crystallography. In contrast, the corresponding N2O2 ligands, salamo and 3-MeOsalamo, gave trinuclear and mononuclear complexes, respectively, in which all the nickel atoms have octahedral geometry.