Crystal structure of catena-poly[[[bis-(1-benzyl-imidazole-κN)copper(II)]-µ-sulfato-κ2 O:O'-[tetra-kis-(1-benzyl-imidazole-κN)copper(II)]-µ-sulfato-κ2 O:O'] N,N-di-methyl-formamide disolvate dihydrate].

The title one-dimensional copper(II) coordination polymer, {[Cu(SO4)(C10H10N2)3]·C3H7NO·H2O} n or {[Cu(bzi)3(µ-O2SO2)]·H2O·DMF} n (bzi = 1-benz-yl-imidazole, C10H10N2; DMF = N,N-di-methyl-formamide, C3H7NO), is constructed by monodentate bzi ligands and bridging sulfate anions, leading to chains propagating parallel to the c axis. Within a chain, there are two crystallographic independent CuII ions, each with site symmetry , which form [CuN2O2] and [CuN4O2] polyhedra alternating along the chain direction. The crystal structure is consolidated by weak hydrogen-bonding, C-H⋯π and π-π inter-actions, leading to the formation of a three-dimensional supra-molecular network.