Crystal structure of 4-benzamido-2-hydroxybenzoic acid

Abstract

In the title compound, C14H11NO4, the dihedral angle between the mean planes of the aromatic rings is 3.96 (12)° and an intramolecular O—H...O hydrogen bond closes an S(6) ring. A short intramolecular C—H...O contact is also seen. In the crystal, carboxylic acid inversion dimers linked by pairs of O—H...O hydrogen bonds generate R22(8) loops. Conversely, the N—H group does not form a hydrogen bond. Aromatic π–π interactions exist at a centroid–centroid distance of 3.8423 (15) Å between the benzene rings. An extremely weak C—H...π interaction also is present.

Keywords

• crystal structure
• hydrogen bonding
• π–π interactions