Synthesis, crystal structure, electrochemistry and antioxidative activity of copper(II), manganese(II) and nickel(II) complexes containing bis(N‐ethylbenzimidazol‐2‐ylmethyl)aniline. (26th March 2015)

• Record Type: Journal Article
• Authors: Wu, Huilu; Peng, Hongping; Zhang, Yanhui; Wang, Fei; Zhang, Han; Wang, Cuiping; Yang, Zaihui
• Is Part Of: Applied organometallic chemistry. Volume 29:Number 7(2015:Jul.)
• Page Start: 443
• Page End: 449
• Publication Date: 2015-03-26
• Subjects: Organometallic chemistry -- Periodicals; Organometallic compounds -- Periodicals; 547.05
• DOI: 10.1002/aoc.3313
• Languages: English
• ISSNs: 0268-2605

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Bis(<italic>N</italic>‐ethylbenzimidazol‐2‐ylmethyl)aniline (Etbba) and its transition metal complexes, [Cu(Etbba)(Cl)₂]⋅DMF (<bold>1</bold>), [Mn(Etbba)(Cl)₂] (<bold>2</bold>) and [Ni(Etbba)(Cl)₂] (<bold>3</bold>), 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 <bold>1</bold> can be described as distorted square‐based pyramidal, while complexes <bold>2</bold> and <bold>3</bold> each have a distorted trigonal bipyramidal geometry. Cyclic voltammograms of complex <bold>1</bold> 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 <italic>in vitro</italic>. Complexes <bold>1</bold>, <bold>2</bold>, <bold>3</bold> are found to possess potent hydroxyl radical scavenging activity and to be better than standard antioxidants like vitamin C and mannitol. Furthermore, complexes <bold>1</bold> and <bold>2</bold> exhibit significant superoxide radical activity. Copyright © 2015 John Wiley &amp; Sons, Ltd.</p> </abstract>