Crystal structure of (E)-2-[(4-hydroxybenzylidene)azaniumyl]benzoate

Abstract

The title Schiff base, C14H11NO3, crystallizes as a zwitterion (i.e.proton transfer from the carboxylic acid group to the imine N atom). The dihedral angle between the aromatic rings is 19.59 (6)° and an intramolecular N—H...O hydrogen bond closes anS(6) ring. In the crystal, inversion dimers linked by pairs of O—H...O hydrogen bonds generateR24(24) loops. The dimers are linked by C—H...O interactions, generating (211) sheets.