In the title compound, C21H24O3, the enone unit is in the s–cis configuration. The dihedral angle between the benzene rings is 2.18 (4)°. In the crystal, molecules are linked by pairs of O—H⋯O intermolecular hydrogen bonds, forming inversion dimers. The crystal structure is also consolidated by C—H⋯π interactions.
In the title compound, C21H24O3, the enone group adopts an s–cis conformation. The planes of the aromatic rings are inclined at an angle of 6.1 (1)°. The alkoxy tail is not linear, with the maximum deviation from the least-squares plane being 0.375 (2) Å. Molecules are connected into extended chains along the a axis through O—H⋯Ocarbonyl hydrogen bonds and are interlinked via C—H⋯O interactions to form a two-dimensional array parallel to the ab plane.
In the title compound, C25H32O3, the enone group adopts an s–cis conformation. The alkoxy unit is nearly planar and is in a trans conformation. The two benzene rings make a dihedral angle of 18.87 (9)°. In the crystal structure, molecules are linked into chains running along the a axis by intermolecular O—H⋯O hydrogen bonds involving the hydroxy and keto groups. The chains are crosslinked along the b axis via C—H⋯O hydrogen bonds, forming a two-dimensional network parallel to the ab plane.
In the title compound, C27H36O3, the asymmetric unit consists of two crystallographically independent molecules. The aromatic rings form dihedral angles of 17.1 (2) and 17.6 (2)° in the two molecules. In both molecules, the enone groups adopt an s–cis conformation and the alkoxyl chains are in trans conformations curving out of the zigzag plane. Intramolecular O—H⋯O hydrogen bonds involving the keto and hydroxy groups generate S(6) ring motifs. The molecules are stacked alternately in a head-to-tail fashion along the a axis and the crystal structure is stabilized by weak C—H⋯π interactions. The crystal studied was a non-merohedral twin, the ratio of components being 0.788 (2):0.212 (2).
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