3,5-Dimethyl-2,6-di­phenyl­piperidine

In the title compound, C₁₉H₂₃N, the piperidine ring has a chair conformation. The phenyl rings are inclined to one another by 52.76 (16)°. One of the methyl substituents on the piperidine ring is axial while the other is equatorial, like the phenyl rings. In the crystal, mol­ecules are linked via C—H...π inter­actions, forming zigzag chains along [001].

(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.

(2E)-1-(3,5-Di­hydroxy­phen­yl)-3-(4-meth­oxy­phen­yl)prop-2-en-1-one

In the title compound, C₁₆H₁₄O₄, the benzene rings are inclined to one another by 4.91 (7)°. The conformation about the C=O and C=C bonds is trans and cis, respectively. In the crystal, mol­ecules are linked by O—H...O hydrogen bonds, forming inversion dimers with an R₂²(14) ring motif. The dimers are linked via O—H...O and C—H...O hydrogen bonds, forming undulating two-dimensional networks lying parallel to (10-1). These networks are linked by further C—H...O hydrogen bonds, forming a three-dimensional structure.

N-[(1-Benzoyl­piperidin-4-yl)meth­yl]benzamide

In the title compound, C₂₀H₂₂N₂O₂, the piperidine ring adopts a chair conformation. The phenyl rings are inclined to one another by 80.1 (1)° and make dihedral angles of 46.1 (1) and 40.2 (1)° with the mean plane of the piperidine ring. In the crystal, pairs of N—H...O hydrogen bonds link the mol­ecules into inversion dimers. C—H...O inter­actions further link the mol­ecules, forming a three-dimensional supramolecular network.

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).