Zinc(II) mediated cyclization and complexation of an unsymmetrical dicarboxyamine ligand: Synthesis, spectral and crystal structures characterizations
作者:Manindranath Bera、Ghezai T. Musie、Douglas R. Powell
DOI:10.1016/j.inoche.2007.12.019
日期:2008.3
Abstract Zinc(II) mediated cyclization product, 3-(1-oxo-1,3-dihydro-isoindol-2-yl)-propionic acid (Hpda) and complexation of the unsymmetrical amino dicarboxylic ligand, N-(2-carboxybenzomethyl)-β-alanine (H2cbal), have been isolated and their crystal structures determined.
Novel tetranuclear copper(II) complex of dicarboxyamine ligand: Syntheses, crystal structures and redox properties
作者:Ghezai T. Musie、Xiaobao Li、Douglas R. Powell
DOI:10.1016/j.ica.2005.12.075
日期:2006.4
The reaction between a new amino dicarboxylic ligand N-(2-carboxybenzomethyl)-beta-alanine (H(2)cbal) obtained by reducing the Schiff base N-(2-carboxybenzoimine)-beta-alanine and copper(II) perchlorate afforded a novel tetracopper(II) complex. This tetracopper(II) complex shows unusual structure and novel core topology. The electrochemical study of the complex using cyclic voltammetrry in acetonitrile indicated the presence of a reversible one-electron reduction and two irreversible reductions at higher potentials. The EPR studies of the complex and one electron reduce form of the complex in acetonitrile at 115 K showed an axial signal with g(vertical bar vertical bar) > g(perpendicular to) > 2.0 and an isotropic signal, respectively. (c) 2006 Elsevier B.V. All rights reserved.