μ-1,1′-Methylenedi-1H-imidazole-κ2N3:N3′-bis[aqua(pyridine-2,6-dicarboxylato)copper(II)] tetrahydrate

The title compound, [Cu2(C7H3NO4)2(C7H8N4)(H2O)2]·4H2O, has a dinuclear structure in which each CuII atom is five-coordinate in a distorted square-based pyramidal geometry and the 1,1′-methyl­enedi-1H-imidazole ligand adopts a bis-monodentate bridging mode, linking the CuII atoms. A twofold rotation axis passes through the C atom linking the imidazole rings. The mol­ecules are connected by O—H⋯O hydrogen bonds [O⋯O = 2.748 (3)–2.973 (3) Å].