Poly[[(μ-1H-benzimidazole-5,6-dicarboxyl­ato)zinc(II)] monohydrate]

The three-dimensional polymeric title compound, {[Zn(C(9)H(4)N(2)O(4))]·H(2)O}(n), contains one crystallographically independent Zn(II) atom, one fully deprotonated 1H-benzimid­azole-5,6-dicarboxyl­ate (bdc) ligand and one uncoordinated water mol­ecule. The Zn(II) atom is four-coordinated by three O atoms and one N atom from the bdc ligands, giving a distorted tetra­hedral coordination geometry. The uncoordinated water mol­ecule is bound to the main structure through a strong bdc–water N—H⋯O hydrogen bond, and two much weaker water–bdc O—H⋯O inter­actions.