Crystal structures of (E)-3-(4-hy­droxy­benzyl­idene)chroman-4-one and (E)-3-(3-hy­droxy­benzyl­idene)-2-phenyl­chroman-4-one

The synthesis and crystal structures of (E)-3-(4-hy­droxy­benzyl­idene)chroman-4-one, C(16)H(12)O(3), I, and (E)-3-(3-hy­droxy­benzyl­idene)-2-phenyl­chroman-4-one, C(22)H(16)O(3), II, are reported. These compounds are of inter­est with respect to biological activity. Both structures display inter­molecular C—H⋯O and O—H⋯O hydrogen bonding, forming layers in the crystal lattice. The crystal structure of compound I is consolidated by π–π inter­actions. The lipophilicity (logP) was determined as it is one of the parameters qualifying compounds as potential drugs. The logP value for compound I is associated with a larger contribution of C⋯H inter­action in the Hirshfeld surface.