McCann, Malachy and Cronin, James F. and Devereux, Michael and McKee, Vickie and Ferguson, George (1995) Mononuclear and binuclear copper(II) complexes of benzene-1,2-dioxyacetic acid (bdoaH2) : X-ray crystal structures of [Cu(bdoa)(C6H5NH2)2]2C6H5NH2 and [Cu2(bdoa)(bipy)4] bdoa·8.66H2O ((C6H5NH2 = ANILINE, bipy = 2,2′-bipyridine). Polyhedron, 14 (23-24). pp. 3617-3626. ISSN 0277-5387

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Abstract

The copper(II) complex [Cu(bdoa)(H2O)2] (1; bdoaH2 = benzene-1,2-dioxyacetic acid) reacts with aniline in an ethanol-water mixture to give [Cu(bdoa) (C6H5NH2)2]2C6H5NH2 (2). The X-ray crystal structure of 2 shows the asymmetric unit to contain two mononuclear [Cu(bdoa)(C6H5NH2)2] units and a solvate aniline molecule. Each copper(II) atom has essentially square planar coordination and is bonded to the nitrogen atoms of two trans aniline molecules and a single oxygen atom from each of the two carboxylate moieties of the bdoa2− ligand. The ether oxygen atoms of the bdoa2− bond only weakly to the metal, and one of the metals also interacts weakly with the solvate aniline. Compound 1 reacts with 2,2′-bipyridine (bipy) to form the binuclear copper(II) complex [Cu2(bdoa)(bipy)4]bdoa·8.66H2O (3). The X-ray crystal structure of 3 shows a discrete [Cu2(bdoa)(bipy)4]2+ dication, an uncomplexed bdoa2− dianion and water molecules linked by OH…O hydrogen bonding. The dication has two-fold crystallographic symmetry, and the coordination of the unique copper atom is N4O2 distorted octahedral. Only one of the carboxylate oxygens is strongly bonded and the other forms a weak interaction with the metal. Spectral, magnetic, conductivity, voltammetry and thermogravimetric data for the complexes are given.

Item Type:	Article
Additional Information:	Cite as: Malachy McCann, James F. Cronin, Michael Devereux, Vickie McKee, George Ferguson, Mononuclear and binuclear copper(II) complexes of benzene-1,2-dioxyacetic acid (bdoaH2) : X-ray crystal structures of [Cu(bdoa)(C6H5NH2)2]2C6H5NH2 and [Cu2(bdoa)(bipy)4] bdoa·8.66H2O ((C6H5NH2 = ANILINE, bipy = 2,2′-bipyridine), Polyhedron, Volume 14, Issues 23–24, 1995, Pages 3617-3626, ISSN 0277-5387, https://doi.org/10.1016/0277-5387(95)00161-K
Keywords:	Mononuclear and binuclear copper(II) complexes; benzene-1,2-dioxyacetic acid (bdoaH2); X-ray crystal structures; [Cu(bdoa)(C6H5NH2)2]2C6H5NH2; [Cu2(bdoa)(bipy)4] bdoa·8.66H2O ((C6H5NH2 = ANILINE, bipy = 2,2′-bipyridine);
Academic Unit:	Faculty of Science and Engineering > Chemistry
Item ID:	14692
Identification Number:	https://doi.org/10.1016/0277-5387(95)00161-K
Depositing User:	Dr. Malachy McCann
Date Deposited:	11 Aug 2021 14:19
Journal or Publication Title:	Polyhedron
Publisher:	Elsevier
Refereed:	Yes
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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