CRYSTAL STRUCTURE OF BIS(N-(2-HYDROXYETHYL)- ETHYLENEDIAMINE)COPPER(II) 2-FURANCARBOXYLATE [Cu(C₄H₁₂N₂O)₂](C₅H₃O₃)₂

Aarne Pajunen and Seija Pajunen

Division of Inorganic Chemistry, Department of Chemistry, University of Helsinki, Box 55, FIN-00014 UNIVERSITY OF HELSINKI, Finland, E-mail: seija.pajunen@helsinki.fi

The crystal structure of the title compound has been determined. The compound crystallizes in the space group P2₁/n with a = 20.093(10), b = 7.483(3), c = 7.193(2) A, b = 100.12(3)^o, Z = 4.

Full-matrix least-squares refinement of 2045 reflections collected by means of a Rigaku AFC7S diffractometer yielded R = 0.0493. The compound consists of discrete complex cations and 2-furancarbyxylate anions. Each of the diamine ligand is tridentate, coordinating in a facial configuration. The coordination geometry around the copper(II) ion is a distorted octahedron, with the chemically equivalent amino groups cis to each other and the alcohol groups in trans positions. This arrangement is similar to that found in bis(N-(2-hydroxyethyl)ethylenediamine)copper(II) perchlorate [1] and succinate [2] complexes.

The 2-furancarboxylate ion is planar. Each complex cation is involved in four N-H...O and one O-H...O hydrogen bonds with neighboring anions.

1. Chastain, R. V, and Dominick, T. L. (1973). Inorg Chem. 12, 2621-2625.
2. Pajunen, A. and Pajunen S. (1978). Cryst. Struct. Comm. 7, 63-66.