Acetate bridged dinuclear Cu(II) complexes with ferrocene based benzimidazol ligands: Synthesis, spectroscopy, electrochemistry, {DFT} calculations and catecholase activity

By Karao?lu, Kaan; Emirik, Mustafa; Mente?e, Emre; Zengin, Ali; Serbest, Kerim
Published in Polyhedron NULL 2016

Abstract

Abstract Two new benzimidazole ligands, 1-[(E)-ferrocenylmethylidenehydrazino]-2-5,6-dichloro-2-[(o-chlorophenyl)methyl]-1,3-diaza-1H-inden-1-yl-1-ethanone (1) and 1-[(E)-ferrocenylmethylidenehydrazino]-2-2-[p-(trifluoromethyl)phenyl]-1,3-diaza-1H-inden-1-yl-1-ethanone (2), and their copper(II) complexes (1a, 2a) have been prepared and characterized by IR, UV-Vis, NMR, TG/DTA and MALDI-TOF mass spectrometry. DFT-based molecular orbital energy calculations and the electrochemical behavior of the compounds have been also studied to explain the redox potentials of the compounds. The catecholase-mimetic activities of the complexes have been investigated by monitoring the formation of 3,5-di-tert-butyl-benzoquinone from 3,5-di-tert-butylcatechol. The catalytic activity of 1a is slightly lower than that of 2a, and the correlation between catalytic activity and electrochemical behaviors of the compounds has been established.

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