binuclear nickel(ii) complex containing 6-methyl-2,2'-bipyridine and chloride ligands: synthesis, characterization, thermal analyses, and crystal structure determination

A new binuclear complex of [{nicl(6-mbipy)}2(μ-cl)2] (1) was prepared from the reaction of nicl2.6h2o and 6-methyl-2,2'-bipyridine (6-mbipy) in a mixture of methanol and acetonitrile. suitable crystals of 1 for x-ray diffraction measurement were obtained by slow evaporation of the resulted green solution at room temperature. complex 1 was characterized by spectral methods (ir, uv–vis, and luminescence), elemental analysis (chn), and single-crystal x-ray diffraction. the structure of 1 is centrosymmetric binuclear complex and each ni(ii) cation is five-coordinated in a slightly distorted square-pyramidal configuration. in this binuclear complex, the ni…ni distance is 3.533(1)å. furthermore, the luminescence emission of the title complex was blue-shifted and is stronger than that of free 6-methyl-2,2'-bipyridine ligand. thermal stabilities of this complex was also studied by thermogravimetric analysis.