Bis(2,6-Diaminopyridinium)-Adipate-Adipic Acid-Water (2/1/1/2)

Abstract

The crystal structure of the title compound, 2C5H8N3 +· C6H8O4 2-·C6H10O4·2H2O, consists of amino-pyridinium cations, adipate dianions, adipic acid mol-ecules and disordered solvent water mol-ecules [occupancies 0.50 (4) and 0.50 (4)]. Both the adipate and adipic acid are located across inversion centres. Eight-membered hydrogen-bonded rings exist involving amino-pyridinium and adipate ions. Adipic acid mol-ecules and adipate anions are linked into zigzag supra-molecular chains by O - H⋯O hydrogen bonds. © International Union of Crystallography 2008.