CRYSTAL AND MOLECULAR-STRUCTURE OF BIS(3-CYANO-2,4 IONATO)-BIS(N,N-DIMETHYLETHYLENEDIAMINE)COPPER(II) - AN UNUSUAL CONFORMATION AND COORDINATION OF A BETA-DIONE

The title compound, C10Hl9N3O2CU, is monoclinic, space group P2(1)/n, Z=2. Cell dimensions are a = 7.6071(6) angstrom, b = 20.623(1) angstro m, c = 7.9777(7) angstrom and beta = 101.7359(7)-degrees. A total of 3 510 reflections were measured with an Enraf Nonius CAD-4 automatic dif fractometer using CuK(alpha) radiation. The structure was refined by f ull-matrix least squares to a conventional R = 0.047 for 2957 unique r eflections. The coordination around the central copper atom is octahed ral with the copper atom on the equatorial plane of four nitrogen atom s. The Cu-N bond lengths have a mean value of 2.0646 angstrom. The two remaining apices of the octahedron are occupied by two nitrogen atoms of the beta-dione groups at distances Cu-N = 2.5143 angstrom.