catena-Poly[[[(1,10-phenanthroline-κ(2) N,N′)zinc]-μ-pyridine-2,3-dicarboxyl­ato-κ(4) N,O (2):O (2′),O (3)] monohydrate]

In the title complex, {[Zn(C(7)H(3)NO(4))(C(12)H(8)N(2))]·H(2)O}(n), the Zn(II) ion is in a distorted octa­hedral environment, defined by two N atoms from a chelating 1,10-phenanthroline (phen) ligand and one N atom and three O atoms from two pyridine-2,3-dicarboxyl­ate (2,3-pydc) ligands. The bridging 2,3-pydc ligands connect the Zn(II) ions into a chain extending along [010]. O—H⋯O hydrogen bonds between the uncoordinated water mol­ecules and the uncoordinated carboxyl­ate O atoms, as well as π–π inter­actions between the pyridine rings of the phen ligands [centroid–centroid distance = 3.557 (2) Å], are observed.