Acridinium (6-carboxy­pyridine-2-carboxyl­ato)(pyridine-2,6-dicarboxyl­ato)zincate(II) penta­hydrate

The reaction of Zn(NO(3))(2) with pyridine-2,6-dicarboxylic acid (pydcH(2)) and acridine (acr) in aqueous solution leads to the formation of the title compound, (C(13)H(10)N)[Zn(C(7)H(3)NO(4))(C(7)H(4)NO(4))]·5H(2)O or (acrH)[Zn(pydcH)(pydc)]·5H(2)O. In the title compound, the Zn(II) atom is coordinated by four O atoms and two N atoms from the tridentate chelating rings of (pydc)(2−) and (pydcH)(−) anions. The geometry of the resulting ZnN(2)O(4) coordination can be described as distorted octa­hedral. To balance the charges, one protonated acridine (acrH)(+) cation is present. In the crystal structure, extensive O—H⋯O and N—H⋯O hydrogen bonds involving acrH(+), the complex anion and uncoordinated water mol­ecules form a three-dimensional network.