title: 4-Amino-pyridinium 2-chloro-4-nitro-benzoate monohydrate.
abstract: In the title hydrated mol-ecular salt, C5H7N2(+)·C7H3ClNO4(-)·H2O, the ions and water mol-ecules assemble into ribbons of R6(5)(22) rings along the c axis via O(water)-H⋯O(-), N(+)-H⋯O(water) and N-H⋯O(-) hydrogen bonds. N-H⋯O(-) hydrogen bonds connect adjacent ribbons along the c-axis direction via R4(4)(12) rings, forming hydrogen-bonded layers. The CO2 and NO2 groups make dihedral angles of 81.8 (2) and 1.4 (2)°, respectively, with the ring in the anion.
authors.affiliation: Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg, PO Wits 2050, South Africa.
authors.forename: Kelsey L
authors.initials: KL
authors.lastname: Savig
authors.forename: Andreas
authors.initials: A
authors.lastname: Lemmerer