Crystal structure of 2-(4-tert-butylphenyl)-3-hydroxy-4H-chromen-4-one

Abstract

Yellow-green fluorescent crystals of the title compound, C19H18O3, were obtained by the reaction of hydroxyacetophenone and 4-tert-butylbenzaldehyde with hydrogen peroxide as oxidant. The plane of the benzene ring is slightly twisted to the mean plane of the 4H-chromene-4-one moiety (r.m.s. deviation = 0.0191 Å) by 10.53 (8)°. In the crystal, molecules are linked by pairs of O-H⋯O hydrogen bonds, forming inversion dimers with an R22(10) ring motif. The dimers are linked via C-H⋯π interactions, forming sheets parallel to (101).