4-Aminopyridinium 2-chloro-4-nitrobenzoate monohydrate

Abstract

In the title hydrated mol­ecular salt, C5H7N2 +·C7H3ClNO4 −·H2O, the ions and water mol­ecules assemble into ribbons of R 6 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 R 4 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.