Copper(II) complexes with a flexible oxamato ligand

Martinez Belmonte, M. and Price, D.J. (2010) Copper(II) complexes with a flexible oxamato ligand. Transition Metal Chemistry, 35(1), pp. 33-40. (doi: 10.1007/s11243-009-9292-y)




We report on a convenient synthesis of the ligand precursor, diethylethylene-1,2-bis(oxamate), (Et2H2oeo, 1), and show how a partial and preferential hydrolysis of the ester group can give rise to the dianionic ligand, (H2oeo)2−. Reaction of this ligand with Cu(II) affords the neutral dimeric species, [Cu2(H2oeo)2], which has a low aqueous solubility. We describe the crystal structure of the hydrate Cu2(H2oeo)2(H2O)4 (2) and report magnetic studies that show a weak exchange interaction in the solid. Under more basic conditions and in the presence of Cu(II) ions, we are able to avoid amide cleavage and yet deprotonate the amide group, resulting in the formation of the highly soluble [Cu(Hoeo)2]4− complex anion. The structure of (NBu4)4[Cu(Hoeo)2](H2O)4 (3) is described and compared with the recently reported anhydrous phase.

Item Type:Articles
Additional Information:The original publication is available at
Glasgow Author(s) Enlighten ID:Price, Dr Daniel
Authors: Martinez Belmonte, M., and Price, D.J.
Subjects:Q Science > QD Chemistry
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Transition Metal Chemistry
ISSN (Online):1572-901X
Published Online:16 October 2009
Copyright Holders:Copyright © 2010 Springer
First Published:First published in Transition Metal Chemistry 35(1):33-40
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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