(E)-3-(4-Hy­droxy-3-meth­oxy­phen­yl)-1-(4-hy­droxy­phen­yl)prop-2-en-1-one

In the title compound, C₁₆H₁₄O₄, there is an intra­molecular O—H...O hydrogen bond. The benzene rings are inclined to one another by 13.89 (9)°. The prop-2-en-1-one group is twisted slightly, the O=C—C_ar—C_ar (ar = aromatic) and C=C—C=O torsion angles being −10.4 (3) and −7.4 (3)°, respectively. In the crystal, mol­ecules are linked by O—H...O hydrogen bonds, forming chains along [100]. These chains are further linked by O—H...O hydrogen bonds, forming corrugated sheets lying parallel to (010). There are C—H...π inter­actions present within the sheets.

Crystal structure of 4-[(2E)-3-(4-meth­oxy­phen­yl)prop-2-eno­yl]phenyl benzoate

In the title compound, C₂₃H₁₈O₄, the meth­oxy­benzene ring and attached C=C grouping are disordered over two sets of sites in a 0.823 (5):0.177 (5) ratio. The dihedral angles between the central benzene ring and the pendant phenyl and meth­oxy­benzene ring (major orientation) are 51.21 (1) and 51.6 (1)°, respectively. In the crystal, inversion dimers linked by pairs of C—H...O hydrogen bonds generate R₂²(28) loops.

Crystal structure of 4-chloro-N-{[1-(4-chloro­benzo­yl)piperidin-4-yl]meth­yl}benzamide monohydrate

In the title compound, C₂₀H₂₀Cl₂N₂O₂·H₂O, the piperidine ring adopts a chair conformation with the two substituent benzene rings inclined to one another [dihedral angle 84.63 (9)°]. In the crystal, the components are linked by Ow—H...O, N—H...Ow (w = water) and C—H...O hydrogen bonds, generating a sheet structure lying parallel to (101).

Crystal structure of (2E)-1-(4-hy­droxy-3-meth­oxy­phen­yl)-3-(4-hy­droxy­phen­yl)prop-2-en-1-one

In the title moleclue, C₁₆H₁₄O₄, the dihedral angle between the benzene rings is 16.1 (3)°. The meth­oxy group is essentially coplanar with the benzene ring to which it is attached, with a C—O—C[pdbond]C torsion angle of 5.5 (9)°. In the crystal, mol­ecules are linked by O—H...O and bifurcated O—H...(O,O) hydrogen bonds, forming a three-dimensional network. The structure was refined as a two-component inversion twin.