Studies on Copper(II) Perchlorate Complex with Tripod Ligand Tris(2-benzimidazolylmethyl)amine

Abstract

A new five-coordinate copper complex with the tripod ligand tris(2-benzimidazolylmethyl)amine (ntb), with composition [Cu(ntb)(H2O)] (ClO4)2·C9H7NO·H2O (C9H7NO = isoquinoline-N-oxide), was synthesized and characterized by means of elemental analyses, electrical conductivities, thermal analyses, I.R., and U.V. The crystal structure of the copper complex has been determined by a single-crystal X-ray diffraction method, and shows that the CuII atom is bonded to a tris(2-benzimidazolylmethyl)amine (ntb) ligand and a water molecule through four N atoms and one O atom, giving a distorted trigonal-bipyramidal coordination geometry with approximate C3molecular symmetry. Cyclic voltammograms of the copper complex indicate a quasireversible Cu+2/Cu+ couple.