Molecular crystal structure of dichloro(NNN′N′-tetraethylethylenediamine)copper(II)

Abstract

The crystal and molecular structure of the title compound has been determined from three-dimensional X-ray data collected by counter methods. Crystals are monoclinic, space group C2/c, with Z= 4 in a cell of dimensions: a= 15·302(9), b= 7·890(4), c= 11·645(8)Å, and β= 90·19(5)°. The structure was solved by heavy-atom methods, and refined by full-matrix least-squares to R 0·024 for 938 independent intensities. The copper atom lies on a C₂ axis, which also passes through the teen ligand. The complex is a four-co-ordinated monomer with distorted square-planar geometry at the copper atom, the plane being formed by the two nitrogen atoms from the teen ligand and the two chlorine atoms. The geometry at copper is entirely different from that in the analogous, but dimeric, tetramethylethylenediamine complex, the closest out-of-plane Cu ⋯ Cl approach being 5·2 Å and shortest Cu ⋯ Cu separation 5·8 Å.