3,3′-[(4-Nitrophenyl)methylene]bis(4-hydroxy-2H-chromen-2-one)

Abstract

The molecular conformation of the title compound, C25H15NO8, is stabilized by strong intramolecular O—H...O hydrogen bonds, resulting in the formation of S11(7) ring motifs. In the crystal, π–π stacking interactions are observed between adjacent nitrobenzene and pyranone rings with a centroid–centroid distance of 3.513 (12) Å. The dihedral angles between the nitrobenzene ring and the coumarin ring systems are 65.61 (8) and 66.11 (8)° while the coumarin ring systems are inclined at 65.69 (8)°.