catena-Poly[[[aqua(5-carboxypyridine-3-carboxylato-κN)copper(I)]-μ-4,4′-bipyridine-κ2N:N′] monohydrate]

In the title compound, {[Cu(C7H4NO4)(C10H8N2)(H2O)]·H2O}n, the CuI ion is coordinated by the N atom from a 5-carboxypyridine-3-carboxylate anion, two N atoms from two 4,4′-bipyridine (4,4′-bipy) ligands and one water molecule in a distorted tetrahedral geometry. The 4,4′-bipy ligands bridge the CuI ions into polymeric chains propagating in [201]. The latticeand the coordinating water molecules as well as the carboxy OH function are involved in the formation of intermolecular O—H...O hydrogen bonds, which consolidate the crystal packing.