Hydrogen bonding in 4-carboxyanilinium dihydrogenphosphate

Abstract

The crystal structure analysis of the title compound, C7H8NO2+·H2PO4−, has revealed a three-dimensional hydrogen-bonded network structure, involving the dihydrogenphosphate anions, the carboxyl groups and the ammonium groups. The anions are held together via strong O—H⋯O hydrogen bonds. In addition to the N—H⋯O and O—H⋯O inter­actions, involving all the H atoms covalently bonded to the anion, the nitro­gen and the carboxyl group, the crystal structure is also stabilized by C—H⋯O and C—H⋯π short contacts.