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In the title molecular salt, C6H9N2+·C9H9O2−, the cation is protonated at the pyridine N atom and the anion is deprotonated at the hydroxy O atom. The dihedral angle between the benzene and pyridine rings is 66.58 (10)°. In the molecular structure, a pair of N—H...O hydrogen bonds links the anion and cation, generating an R22(8) ring motif. These ring motifs are connected to adjacent anions and cations via intermolecular N—H...O hydrogen bonding, generating a bifurcated R22(8) ring motif. C—H...O, C—H...π and π–π [centroid-to-centroid distances = 3.7053 (11) and 3.9547 (13) Å] interactions lead to the formation of a three-dimensional network.