title: Anilinium-3-carboxyl-ate 3-carb-oxy-anilinium nitrate.
abstract: The title compound, C7H8NO2(+)·NO3(-)·C7H7NO2, exists in the form of a protonated dimer of two anilinium-3-carboxyl-ate mol-ecules related by an inversion center, and a nitrate anion located on a twofold rotation axis. The bridging H atom occupies, with equal probability, the two sites associated with the carboxyl atoms. In addition to the strong O-H⋯O hydrogen bond, in the crystal, the various units are linked via N-H⋯O and C-H⋯O hydrogen bonds forming a three-dimensional structure.
authors.affiliation: Department of Chemistry, University of Engineering and Technology, Lahore 54890, Pakistan.
authors.forename: Saeed
authors.initials: S
authors.lastname: Ahmad
authors.forename: Sajjad
authors.initials: S
authors.lastname: Hussain
authors.forename: Shahzad
authors.initials: S
authors.lastname: Sharif
authors.forename: Islam Ullah
authors.initials: IU
authors.lastname: Khan
authors.forename: Muhammad Nawaz
authors.initials: MN
authors.lastname: Tahir