(2,2 '-Bipyridine-kappa N-2,N ')tetrakis(dimethyl sulfoxide-kappa O)copper(II) bis(perchlorate)

The title compound, [Cu(C2H6OS)(4)(C10H8N2)](ClO4)(2), contains a Cull ion with a distorted octahedral coordination environment, bonded by four O atoms of the monodentate dimethyl sulfoxide ligands and two N atoms of the bidentate chelating 2,2'-bipyridine ligand. The equatorial Cu-N and Cu-O bond lengths are in the range 1.979 (2)-1.998 (3) angstrom. The axial Cu-O bond distances are 2.365 (2) and 2.394 (2) angstrom. In the crystal, the complex cations and perchlorate anions are connected by numerous C-H center dot center dot center dot O hydrogen bonds, which leads to additional stabilization of the structure. The perchlorate anion is disordered over two sets of sites with a 0.716 (3):0.284 (3) occupancy ratio.