2-Ethylimidazolium terephthalate

Abstract

The asymmetric unit of the title compound, C5H9N2+·C8H5O4−, consists of one protonated 2-ethylimidazolium cation and two half terephthalate anions. The anions and cations are linked through N—H...O hydrogen bonds while the anions are associated via O—H...O interactions, resulting in a layered structure. The ethyl group of the cation is disordered over twosites of occupancies 0.812 (14) and 0.188 (14). The hydroxy H atoms of the anions are equally disordered over two symmetry-related sites.