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Journal of Structural Chemistry

2010 year, number 5

STRUCTURE AND MAGENTIC PROPERTIES OF NOVEL CHELATE COMPLEXES OF COPPER(ii) AND nICKEL(II) WITH NITROXIDE RADICAL ETHYL-2-(1-OXYL-2,2,5,5-TETRAMETHYLIMIDAZOLIDIN-4-YLIDEN)-3-OXOPROPANOATE

A. B. Burdukov, K. S. Bekker, G. A. Stepanov, A. L. Bogatyrev, N. V. Pervukhina, A. S. Bogomyakov, V. A. Reznikov
Keywords: nitroxide radicals, complexes, structure, magnetic properties
Pages: 951-956

Abstract

Chelate complexes of copper(II) and nickel(II) with anions of nitroxide radical ethyl-2-(1-oxyl-2,2,5,5-tetramethylimidazolidin-4-yliden)-3-oxopropanoate (HL) are synthesized. The compounds have molecular structure and zero magnetic dimensionality. CuL2 crystallizes as two polymorphs having mononuclear structure. Ni2L4 forms dimeric molecules by virtue of the bridging function of the aldehyde oxygen atoms. Magnetic properties of Ni2L4 are determined by antiferromagnetic exchange interactions between the Ni(II) ions (-48(1) K) propagated through the oxygen bridges.