Find in Library

In the crystal structure of the title proton-transfer compound, CH6N3O+·C7H4NO4−, O—H...O and N—H...O hydrogen bonds are formed respectively between the cations and the anions, each component affording a supramolecular chain along the c axis. The cation and anion chains are further linked by N—H...O and N—H...N hydrogen bonds. A π–π interaction is also observed between the pyridine rings; the interplanar separation and the centroid–centroid distance are 3.3425 (6) and 4.6256 (11) Å, respectively.