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Acta Cryst. (2013). E69, o94-o95
[ doi:10.1107/S1600536812050374 ]

2-Amino-5-methylpyridinium 4-methylbenzoate

K. Thanigaimani, A. Farhadikoutenaei, S. Arshad and I. A. Razak

Abstract: The 4-methylbenzoate anion of the title salt, C6H9N2+·C8H7O2-, is nearly planar, with a dihedral angle of 6.26 (10)° between the benzene ring and the carboxylate group. In the crystal, the protonated N atom and the 2-amino group of the cation are hydrogen bonded to the carboxylate O atoms of the anion via a pair of N-H...O hydrogen bonds with an R22(8) ring motif, forming an approximately planar ion pair with a dihedral angle of 9.63 (4)° between the pyridinium and benzene rings. The ion pairs are further connected via N-H...O and weak C-H...O hydrogen bonds, forming a two-dimensional network parallel to the bc plane.

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