title: l-Histidinium p-toluene-sulfonate.
abstract: In the title salt, C6H10N3O2 (+)·C7H7O3S(-), the imidazole ring makes a dihedral angle of 70.93 (12)° with the plane of the toluene ring. In the crystal, the ions are linked via N-H⋯O and weak C-H⋯O hydrogen bonds forming two-dimensional networks lying parallel to (001). These networks are linked via C-H⋯π inter-actions, forming a three-dimensional structure.
authors.affiliation: Department of Physics, Anna University, Chennai 600 025, India.
authors.forename: Srinivasan
authors.initials: S
authors.lastname: Muralidharan
authors.forename: Perumal
authors.initials: P
authors.lastname: Nagapandiselvi
authors.forename: Thothadri
authors.initials: T
authors.lastname: Srinivasan
authors.forename: Rengasamy
authors.initials: R
authors.lastname: Gopalakrishnan
authors.forename: Devadasan
authors.initials: D
authors.lastname: Velmurugan