(±)-3-Carboxy-2-(imidazol-3-ium-1-yl)propanoate

Abstract

The title compound, C7H8N2O4, crystallizes as a zwitterion, with molecules organized into molecular sheets via carboxyl–carboxylate and N+—H...carboxylate contacts. These sheets are constructed from translationally related molecules that further link to neighboring motifs via π-stacking [centroid–centroid distance 3.504 (3) Å] and weak C—H...O contacts.