Crystal structures of thiocyanate polyamine copper(II) complexes. Part IV. Di-µ-thiocyanato-bis[di-(2-aminoethyl)amine]dicopper(II) diperchlorate

Abstract

Crystals of the title compound are triclinic, space group P, with Z= 2 (i.e. 1 dimer) in a unit cell of dimensions a= 11·81 (2), b= 7·48 (2), c= 7·48 (2)Å, α= 70·9(3), β= 89·7(3), γ= 105·4(3)°. The structure was solved from diffractometer data by Patterson and Fourier methods and refined by block-diagonal least-squares methods to R 0·044 for 1564 observed reflections. The co-ordination polyhedron of the copper(II) ion may be considered as a tetragonally distorted octahedron, with the base formed by amine (mean Cu–N 2·01 Å) and thiocyanate nitrogen (Cu–N 1·95 Å) atoms, and apical positions occupied by the sulphur (Cu–S 2·76 Å) of the bridging thiocyanate and a long contact by one perchlorate oxygen atom (Cu–O 2·90 Å); if only the five nearest contacts are considered, the co-ordination is square pyramidal.