2-Amino-1-methyl-4-oxo-4,5-di­hydro-1H-imidazol-3-ium 4-methyl­benzene­sulfonate

摘要

The title mol­ecular salt, C4H8N3O+·C7H7O3S−, is composed of a 2-amino-1-methyl-4-oxo-4,5-dihydro-1H-imidazol-3-ium cation and a 4-methyl­benzene­sulfonate anion. The cation is protonated at its N atom and the anion is deprotonated at its hy­droxy O atom. The imidazole ring is planar (r.m.s. deviation = 0.033 Å) and makes a dihedral angle of 7.87 (10)° with the benzene ring of the anion. In the crystal, the anions and cations are connected by two N—H⋯O hydrogen bonds, generating an R22(8) ring motif. These units are linked by further N—H⋯O hydrogen bonds and C—H⋯O and C—H⋯π contacts to form chains propagating along the a-axis direction.