Bis(2,6-diaminopyridinium) bis(pyridine-2,6-dicarboxylato)zincate(II) monohydrate

In the title hydrated molecular salt, (C5H8N3)2[Zn(C7H3NO4)2]·H2O, the ZnII atom is coordinated by two O,N,O′-tridentate pyridine-2,6-dicarboxylate dianions, generating a slightly distorted trans-ZnN2O4 octahedral coordination geometry for the metal ion. In the crystal, a network of O—H...O, N—H...O and C—H...O hydrogen bonds involving the cations, anions and water molecules results in a three-dimensional network