Crystal structure of (E)-2-hydroxy-4′-methoxyazastilbene

The title azastilbene derivative, C14H13NO2 {systematic name: (E)-2-[(4-methoxybenzylidene)amino]phenol}, is a product of the condensation reaction between 4-methoxybenzaldehyde and 2-aminophenol. The molecule adopts an E conformation with respect to the azomethine C=N bond and is almost planar, the dihedral angle between the two substituted benzene rings being 3.29 (4)°. The methoxy group is coplanar with the benzene ring to which it is attached, the Cmethyl—O—C—C torsion angle being −1.14 (12)°. There is an intramolecular O—H...N hydrogen bond generating an S(5) ring motif. In the crystal, molecules are linked via C—H...O hydrogen bonds, forming zigzag chains along [10-1]. The chains are linked via C—H...π interactions, forming a three-dimensional structure.

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