Ammonium 4-(4-carb­oxy­phen­oxy)benzoate

摘要

The anions of the title salt, NH4 ⁺·HO2CC6H4–O–C6H4CO2 ⁻, are linked by inter­molecular –CO2H⋯O2C– hydrogen bonds, forming a polyanionic chain in the crystal; adjacent chains are connected through the ammonium cation into a layer structure, with the ammonium cation serving as hydrogen-bond donor to four carboxyl­ate O atoms. The cation and anion both lie on special positions of 2 site symmetry. In the anion, the rings make a dihedral angle of 65.3 (1)°. The acid H atom is disordered about the special position.