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Journal of Structural Chemistry

2008 year, number 6

THE STRUCTURE OF A NEW COPPER(II) COMPLEX WITH 3-METHYL-5-CARBOXYLATOPYRAZOLE

L. G. Lavernova, E. V. Peresypkina, A. S. Zhilin, O. G. Shakirova, M. N. Novikov, S. F. Vasilevskii
Keywords: crystal and molecular structure, complex, copper, pyrazole derivatives
Pages: 1143-1146

Abstract

Molecular and crystal structures of a new complex compound of copper(II) with 3-methyl-5-carboxylatopyrazole (СН3PzCOO-) with the composition Cu(СН3PzCOO)2⋅H2O have been determined by single crystal XRD. It has been demonstrated that the carboxylate ion performs the bridging tridentate function. In the equatorial plane coordination occurs through the pyridine N atom of the pyrazole and one of O atoms of the carboxylate group yielding a five-membered metallocycle CuNOC2. The second О atom of one of the ligands is bound to the neighboring copper(II) ion affording an infinite linear chain. The coordination polyhedron of the copper atom is a square pyramid, coordination core CuN2O3.