Crystal structure of catena-poly[[[bis­(1-benzyl­imidazole-κN)copper(II)]-μ-sulfato-κ(2) O:O′-[tetra­kis­(1-benzyl­imidazole-κN)copper(II)]-μ-sulfato-κ(2) O:O′] N,N-di­methyl­formamide disolvate dihydrate]

The title one-dimensional copper(II) coordination polymer, {[Cu(SO(4))(C(10)H(10)N(2))(3)]·C(3)H(7)NO·H(2)O}( n ) or {[Cu(bzi)(3)(μ-O(2)SO(2))]·H(2)O·DMF}( n ) (bzi = 1-benz­yl­imidazole, C(10)H(10)N(2); DMF = N,N-di­methyl­formamide, C(3)H(7)NO), 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 Cu(II) ions, each with site symmetry [Image: see text] , which form [CuN(2)O(2)] and [CuN(4)O(2)] polyhedra alternating along the chain direction. The crystal structure is consolidated by weak hydrogen-bonding, C—H⋯π and π–π inter­actions, leading to the formation of a three-dimensional supra­molecular network.