Crystal and molecular structure of bis(3-cyano-2,4 pentanedionato)-bis(N,N-dimethylethylenediamine)copper(II). An unusual conformation and co-ordination of a β-dione

Abstract

Abstract The title compound, C10H19N3O2Cu, is monoclinic, space group P21/n, Z = 2. Cell dimensions are a = 7.6071(6) Å, b = 20.623(1) Å, c = 7.9777(7) Å and β = 101.7359(7)°. A total of 3510 reflections were measured with an Enraf Nonius CAD-4 automatic diffractometer using CuKα radiation. The structure was refined by full-matrix least squares to a conventional R = 0.047 for 2957 unique reflections. The coordination around the central copper atom is octahedral with the copper atom on the equatorial plane of four nitrogen atoms. The Cu–N bond lengths have a mean value of 2.0646 Å. The two remaining apices of the octahedron are occupied by two nitrogen atoms of the β-dione groups at distances Cu–N = 2.5143 Å.