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

Abstract

The molecular conformation of the title compound, C 25H 15NO 8, is stabilized by strong intramolecular O - H⋯O hydrogen bonds, resulting in the formation of S 11(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)°.