A proton transfer compound: propane-1,3-diaminium–pyridine-2,6-dicarboxylate–pyridine-2,6-dicarboxylic acid–water (2/2/2/5)

Abstract

The title compound, C3H12N22+·C7H3NO42−·C7H5NO4·2.5H2O, is a proton-transfer system obtained from pyridine-2,6-dicarboxylic acid and propane-1,3-diamine. Both neutral and dianionic forms of the diacid are observed in the crystal structure. The mol­ecular structure contains also the diprotonated form of propane-1,3-diamine as well as water mol­ecules. In the crystal structure, a wide range of hydrogen-bonding inter­actions connect the various fragments into a supramolecular structure.