2-Hydroxy-3-nitrobenzamide

Abstract

The asymmetric unit of title compound, C7H6N2O4, contains two molecules, one of which has a disordered nitro group with an occupancy ratio of 0.517 (9):0.483 (9) for the O atoms. Both molecules contain an intramolecular O—H...O hydrogen bond. In the crystal, both molecules form inversion dimers linked by pairs of N—H...O hydrogen bonds, resulting in R22(8) ring motifs. The dimers are connected by further N—H...O links and weak C—H...O interactions, resulting in a layered motif.