Synthesis,crystal structure,electrochemistry and antioxidative activity of copper(II), manganese(II) and nickel(II) complexes containing bis(N‐ethylbenzimidazol‐2‐ylmethyl)aniline |
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Authors: | Huilu Wu Hongping Peng Yanhui Zhang Fei Wang Han Zhang Cuiping Wang Zaihui Yang |
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Institution: | School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu, PR China |
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Abstract: | Bis(N‐ethylbenzimidazol‐2‐ylmethyl)aniline (Etbba) and its transition metal complexes, Cu(Etbba)(Cl)2]?DMF ( 1 ), Mn(Etbba)(Cl)2] ( 2 ) and Ni(Etbba)(Cl)2] ( 3 ), have been synthesized and characterized on the basis of elemental analysis, molar conductivity, UV–visible, infrared and NMR spectroscopies and X‐ray crystallography. The coordination environment of complex 1 can be described as distorted square‐based pyramidal, while complexes 2 and 3 each have a distorted trigonal bipyramidal geometry. Cyclic voltammograms of complex 1 indicate an electrochemically quasi‐reversible Cu2+/Cu+ couple. In addition, the antioxidant activities of the free ligand and its complexes were investigated using the superoxide and hydroxyl radical scavenging methods in vitro. Complexes 1 , 2 , 3 are found to possess potent hydroxyl radical scavenging activity and to be better than standard antioxidants like vitamin C and mannitol. Furthermore, complexes 1 and 2 exhibit significant superoxide radical activity. Copyright © 2015 John Wiley & Sons, Ltd. |
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Keywords: | benzimidazole transition metal complexes crystal structure electrochemical property antioxidation |
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