catena-Poly[[[aqua­(pyrazino­[2,3-f][1,10]phenanthroline-κ(2) N (8),N (9))zinc(II)]-μ-penta­nedioato] monohydrate]

In the title compound, {[Zn(C(5)H(6)O(4))(C(14)H(8)N(4))(H(2)O)]·H(2)O}(n), the Zn(2+) ion is coordinated by an N,N′-bidentate pyrazino­[2,3-f][1,10]phenanthroline (pyphen) ligand, a water molecule and a monodentate glutarate (glu) dianion. A symmetry-generated O:O′-bidentate glu dianion completes a distorted cis-ZnN(2)O(4) octa­hedral coordination geometry for the metal ion. The bridging glu species generates [110] polymeric chains in the crystal. O—H⋯O hydrogen bonds involving both the coordinated and uncoordinated water mol­ecules help to consolidate the structure and neighbouring pyphen units inter­act through numerous aromatic π–π inter­actions [minimum centroid–centroid separation = 3.654 (3) Å], resulting in a two-dimensional network.