Crystal structure, hydrogen bonding and Hirshfeld surface analysis of 2-amino-4-meth­oxy-6-methyl­pyrimidinium 4-chloro­benzoate

In the crystal structure of the title salt, C(6)H(10)N(3)O(+)·C(7)H(4)ClO(2) (−), the dihedral angle between the pyrimidine ring of the 2-amino-4-meth­oxy-6-methyl­pyrimidine cation and the the benzene ring of the 2-chloro­benzoate anion is 2.2 (1)°. In the anion, the benzene ring forms a dihedral angle of 8.5 (2)° with the carboxyl group. The pyrimidine N atom of the cation is protonated and the meth­oxy substituent is essentially coplanar with the parent ring. The protonated N atom and the N atom of the 2-amino group are hydrogen bonded to the 4-chloro­benzoate anion through a pair of N—H⋯O(carbox­yl) hydrogen bonds, forming an R (2) (2)(8) ring motif linked through a centrosymmetric R (2) (4)(8) ring motif, resulting in a pseudo­tetra­meric DDAA array. These units are linked through inter­molecular meth­oxy C—H⋯Cl hydrogen bonds into ribbon-like chains extending along the c-axis direction. The crystal structure also features π–π stacking inter­actions between the rings in the cation and anion [minimum ring centroid separation = 3.7707 (12) Å].