2-Amino-6-methylpyridinium 2-carboxybenzoate

Abstract

In the title molecular salt, C 6H 9N 2+·C 8H 5O 4-, an intramolecular O - H⋯O hydrogen bond occurs within the anion, thereby generating an S(7) ring, which may correlate with the fact that both the carboxylic acid and carboxylate groups are almost coplanar with their attached rings [dihedral angles = 2.9 (3) and 5.2 (3)°, respectively]. In the crystal, each cation is linked to its adjacent anion by two N - H⋯O hydrogen bonds; the dihedral angle between the pyridine and benzene rings is 2.22 (10)°. The ion pairs are linked by further N - H⋯O interactions.