Crystal structure of 2-amino-7-hydroxy-4-(4-hydroxyphenyl)-4H-chromene-3-carbonitrile

Abstract

In the title compound, C16H12N2O3, the chromene ring system is nearly planar [maximum deviation from the mean plane = 0.057 (1) Å], and is almost perpendicular to the benzene ring, with a dihedral angle of 85.29 (5)°. In the crystal, molecules are linked by classical N—H...O, O—H...O and O—H...N hydrogen bonds, and weak C—H...O hydrogen bonds, forming a three-dimensional supramolecular network. Furthermore, a weak π–π stacking interaction is observed; the centroid-to-centroid distance is 3.7260 (7) Å.

Keywords

• crystal structure
• chromene
• hydrogen bonding,