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Title: Synthesis and characterization of -phenoxo-bridged binuclear copper(II) complexes derived from binucleating ligands
Authors: Thirumavalavan, M
Rayappan, S Maria
Akilan, P
Kandaswamy, M
Issue Date: Jan-2004
Publisher: CSIR
IPC CodeC01G3/00
Abstract: The new pentadentate binucleating symmetrical ligand 2,6-bis [N-(3,5-dichloro-2-hydroxybenzyl)-N-cyclohexylamino-methyl]-4-methylphenol (H3L1) has been prepared and its binuclear copper(II) complexes of the general formula [Cu2L(X)], where X = OH (perchlorato counter ion complexes), OAc, NO3 have been prepared. Their spectral properties and catecholase activities were studied. New unsymmetrical ligands and their complexes have also been synthesized. The phenolate oxygen atom of the binucleating ligands behaves as a bridging group. Conductivity studies showed that all the complexes are neutral. ESR spectra of the complexes show a broad band centred at 3500 G with no hyperfine splittings. The observed room temperature magnetic studies were found to be less than spin only value for d9 system. The rate constants of the complexes for the oxidation of catechol to o-quinone were in the range of 0.7210-3 to 15.010-3 min-1.
Page(s): 29-34
ISSN: 0975-0991 (Online); 0971-457X (Print)
Source:IJCT Vol.11(1) [January 2004]

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