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Journal of Structural Chemistry

2013 year, number 5


Yu. M. Chumakov1, T. B. Capatina2, P. Petrenko1, V. I. Tsapkov2, A. P. Gulea2
1Institute of Applied Physics, Academy of Sciences of Moldova, Moldova, Chisinau
2Moldova State University, Moldova, Chisinau
Keywords: 3d metal complexes, single crystal X‑ray diffraction study, carbamide derivatives


The crystal structure of tetra(m-acetato)-bis{[1-ethyl-3-(pyridine-2-yl)carbamide]copper} Cu2(L)2(CH3COO)4 (I), where L is 1-ethyl-3-(pyridine-2-yl)carbamide, is determined. The asymmetric unit cell of the crystal structure of I contains a copper complex with two acetate ions and a monodentate molecule of 1-ethyl-3-(pyridine-2-yl)carbamide, which is coordinated via the pyridine nitrogen atom. Due to the symmetry center, binuclear complexes form in the crystal, in which the acetate ions act as bridges between the metal atoms. In them, the coordination polyhedron of the central copper atoms represents an almost ideal tetragonal pyramid. Its base is formed from the oxygen atoms of acetate ions. In the crystal of the binuclear complex, hydrogen bonds form between the acetate ions and the L ligand along with an intramolecular hydrogen bond, which stabilize the conformation of the organic L molecule. Between the neighboring complexes in the crystal, the van der Waals interaction occurs.