μ2-Oxalato-κ2 O, O′:κ2 O′′, O′′′-bis­[aqua­(1,10-phenanthroline-κ2 N, N′)copper(II)] dinitrate dihydrate.

The title complex, [Cu2(C2O4)(C12H8N2)2(H2O)2](NO3)2·2H2O, is a centrosymmetric oxalate-bridged binuclear CuII complex with an inversion center located at the mid-point of the C—C bond of the bridging oxalate ligand. The Cu atom has five-coordinate square-pyramidal geometry. A network of O—H⋯O hydrogen bonds helps to consolidate the crystal packing. [ABSTRACT FROM AUTHOR]