Synthesis,Structure and Properties of a Binuclear Copper Complex [Cu(Br_2hama)(DMF)]_2,where Br_2hamaH_2=[(3,5-Dibromo-2-hydroxybenzyl-idene)-amino]-methanesulfonic Acid

The copper(Ⅱ) compound [Cu(Br2hama)(DMF)]2 (C22H24Br4Cu2N4O10S2,Br2hamaH2 = [(3,5-dibromo-2-hydroxybenzylidene)-amino]-methanesulfonic acid,DMF = N,Nˊ-dimethylfor-mamide) 1 crystallizes in triclinic,space group P1 with a = 8.477(2),b = 10.164(2),c = 10.671(2) ,α = 112.66(3),β = 104.33(3),γ = 96.67(3)°,Z = 1,and R = 0.0789 for 1823 observed reflections with Ⅰ > 2σ(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···π hydrogen bonds. The CuII···CuII distance is 4.937(1) .