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

Yellow–green fluorescent crystals of the title compound, C(19)H(18)O(3), 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 R (2) (2)(10) ring motif. The dimers are linked via C—H⋯π inter­actions, forming sheets parallel to (10-1).