Synthesis and crystal structure of 4-fluoro-benzyl-ammonium di-hydrogen phosphate, [FCHCHNH]HPO.

The asymmetric unit of the title salt, [-FCHCHNH]·HPO, contains one 4-fluoro-benzyl-ammonium cation and one di-hydrogen phosphate anion. In the crystal, the HPO anions are linked by O-H⋯O hydrogen bonds to build corrugated layers extending parallel to the plane. The FCHCHNH cations lie between these anionic layers to maximize the electrostatic inter-actions and are linked to the HPO anions through N-H⋯O hydrogen bonds, forming a three-dimensional supra-molecular network.