(2Z)-4-[(2-Hydroxyphenyl)carbamoyl]prop-2-enoic acid

Abstract

In the title compound, C10H9NO4, the 2-hydroxyanilinic and the 4-oxobut-2-enoic acid groups are almost planar, with r.m.s. deviations of 0.0086 and 0.0262 Å, respectively. The dihedral angle between the two groups is 6.65 (1)°. Intramolecular N—H...O, C—H...O and O—H...O hydrogen bonds form S(5), S(6) and S(7) ring motifs. In the crystal, the molecules are dimerized due to C—H...O and O—H...O intermolecular hydrogen bonds, with R22(8) ring motifs. The dimers are interlinked into polymeric chains along [010] with R43(13) ring motifs by C—H...O, N—H...O and O—H...O hydrogen bonds.