2-Amino-5-methylpyridinium 4-methylbenzoate

The 4-methylbenzoate anion of the title salt, C6H9N2+center dot-C8H7O2-, is nearly planar, with a dihedral angle of 6.26 (10)degrees 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 center dot center dot center dot O hydrogen bonds with an R-2(2)(8) ring motif, forming an approximately planar ion pair with a dihedral angle of 9.63 (4)degrees between the pyridinium and benzene rings. The ion pairs are further connected via N-H center dot center dot center dot O and weak C-H center dot center dot center dot O hydrogen bonds, forming a two-dimensional network parallel to the bc plane.