摘要:
Two Ni(II) complexes of the dianionic ligands, Mebpb(2-) , [H(2)Mebpb = N,N'-bis(pyridine-2-carboxamido)-4- methylbenzene] and Mebqb(2-), [H(2)Mebqb = N,N'-bis(quinoline-2-carboxamido)-4-methylbenzene] have been synthesized and characterized by elemental analyses, IR, and UV-Vis spectroscopy. The crystal and molecular structures of [Ni(Mebpb)], (1), and [Ni(Mebqb)], (2), were determined by X-ray crystallography. Both complexes exhibit distorted square-planar NiN4 coordination figures with two short and two long Ni-N bonds (Ni-N similar to 1.84 and similar to 1.95 angstrom, respectively). The electrochemical behavior of these complexes with the goal of evaluating the structural effects on the redox properties has been studied. (C) 2009 Elsevier B. V. All rights reserved.