O-BIS(2,2'6',2''-TERPYRIDINE-N,N',N'')DICOPPER(II) PERCHLORATE ACETONITRILE, [CU-2(CN)(C15H11N3)(2)]-(CLO4)(3).CH3CN

The [Cu-2(terpy)(2)(CN)](3+) cation (terpy is 2,2':6',2 ''-terryridine ) is non-centrosymmetric and contains two Cu-II centres bridged by a d isordered cyano group. The overall geometry around both metallic centr es can be described as a distorted octahedron. The equatorial coordina tion plane is occupied by the N atoms of the tridentate terpy ligand a nd by an atom (C or N*) of the cyanide bridge. The axial positions fo r one Cu atom are occupied by O atoms of two perchlorate anions while, for the other Cu atom, a perchlorate ion and an acetonitrile molecule lie in trans positions.