Synthesis, Structure and Properties of a Binuclear Copper Complex [Cu(Br(2)hama)(DMF)](2), where Br(2)hamaH(2) = [(3,5-Dibromo-2-hydroxybenzylidene)-amino]-methanesulfonic Acid

The copper(II) compound [Cu(Br(2)hama)(DMF)](2) (C22H24Br4Cu2N4O10S2, Br(2)hamaH(2) = [(3,5-dibromo-2-hydroxybenzylidene)-amino]-methanesulfonic acid, DMF = N,N'-dimethylformamide) 1 crystallizes in triclinic, space group P (1) over bar with a = 8.477(2), b = 10.164(2), c = 10.671(2) angstrom, alpha = 112.66(3), beta = 104.33(3), gamma = 96.67(3)degrees, Z = 1, and R = 0.0789 for 1823 observed reflections with I > 2 sigma(I). The centrosymmetric molecule comprises a pair of copper atoms connected by two anions of [(3,5-dibromo-2-hydroxybenzylidene)-amino]-methanesulfonic acid in a tetradentate coordination mode. The five-coordination of copper(II) is further completed by DMF The complex forms a 1-D chain through C-H center dot center dot center dot pi hydrogen bonds. The Cu-II center dot center dot center dot Cu-II distance is 4.937(1) angstrom.