Synthesis and Characterization of Unique Nickel(II) Carboxylates and Their Coordination Complexes

摘要

Direct anodic dissolution of nickel metal and cathodic reduction of carboxylic acids (RCOOH) in acetonitrile has proved to be a simple and efficient one-step route to synthesize unique polymeric nickel(II) carboxylate complexes, (Ni(OOCR)2}_nin H-type glass Pyrex cell. When the oxidation was carried out in the presence of neutral ligands (L) such as 2,2'-bipyridyl or 1,10-phenanthroline, the complexes of type (Ni(OOCR)2.L}_n were obtained. Tetrabutylammonium chloride has been used as a supporting electrolyte in order to increase the electrolytic conductivity of the electrochemical system which in turn affects the current efficiency, cell voltage and energy consumption in the electrolytic cell. The complexes have been characterized by vibrational spectra, CHN elemental analysis, solubility and melting points shows a good agreement with the structure. The result also shows that the direct electrochemical synthetic technique has high current efficiency, extra purity and yield.