Crystal structure of 4-methyl-N-[2-(piperidin-1-yl)eth-yl]benzamide monohydrate.

In the title compound, C15H22N2O·H2O, the dihedral angle between the planes of the piperidine and benzene rings is 31.63 (1)°. The piperidine ring adopts a chair conformation. The water solvent mol-ecule is involved in inter-species O-H⋯O, O-H⋯N, N-H⋯O and weak C-H⋯O hydrogen-bonding inter-actions, giving rise to chains extending along [010].

Crystal structure of 2-chloro-1-(3-methyl-2,6-di-phenyl-piperidin-1-yl)ethanone.

In the title compound, C20H22ClNO, the piperidine ring has a twist-boat conformation. There is an intra-molecular C-H⋯π inter-action involving the two phenyl rings which are inclined to one another by 84.91 (7)°. In the crystal, mol-ecules are linked via C-H⋯O hydrogen bonds, forming helical chains along [010]. The chains are linked by C-H⋯π inter-actions, forming sheets parallel to (100).

Crystal structure of 4-chloro-N-[2-(piperidin-1-yl)eth-yl]benzamide monohydrate.

In the title compound, C14H19ClN2O2·H2O, the piperdine ring adopts a chair conformation. The dihedral angle between the mean plane of the piperidine ring and that of the phenyl ring is 41.64 (1)°. In the crystal, mol-ecules are linked by O-H⋯N, N-H⋯O and C-H⋯O hydrogen bonds involving the water mol-ecule, forming double-stranded chains propagating along [010].

Crystal structure of 4-chloro-N-{[1-(4-chloro-benzo-yl)piperidin-4-yl]meth-yl}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 4-methyl-N-{[1-(4-methyl-benzo-yl)piperidin-4-yl]meth-yl}benzamide.

In the title compound, C22H27N2O2, the piperidine ring adopts a half-chair conformation with the benzene rings inclined in a trans orientation with respect to the piperidine ring [dihedral angle between the benzene rings = 89.1 (1)°]. In the crystal, a three-centre asymmetric N-H⋯O/C-H⋯O hydrogen-bonding inter-action leads to the formation of chains extending along the a-axis direction.

Crystal structure of (2E)-1-(4-hy-droxy-3-meth-oxy-phen-yl)-3-(4-hy-droxy-phen-yl)prop-2-en-1-one.

In the title moleclue, C16H14O4, the dihedral angle between the benzene rings is 16.1 (3)°. The meth-oxy group is essentially coplanar with the benzene ring to which it is attached, with a C-O-C C torsion angle of 5.5 (9)°. In the crystal, mol-ecules 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.

Crystal structure of 4-[(2E)-3-(4-meth-oxy-phen-yl)prop-2-eno-yl]phenyl benzoate.

In the title compound, C23H18O4, the meth-oxy-benzene 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 meth-oxy-benzene 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 R 2 (2)(28) loops.

N-[(1-Benzoyl-piperidin-4-yl)meth-yl]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 mol-ecules into inversion dimers. C-H⋯O inter-actions further link the mol-ecules, forming a three-dimensional supramolecular network.

(E)-3-(4-Hy-droxy-3-meth-oxy-phen-yl)-1-(4-hy-droxy-phen-yl)prop-2-en-1-one.

In the title compound, C16H14O4, there is an intra-molecular 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-Car-Car (ar = aromatic) and C=C-C=O torsion angles being -10.4 (3) and -7.4 (3)°, respectively. In the crystal, mol-ecules 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 inter-actions present within the sheets.

(2E)-1-(3,5-Di-hydroxy-phen-yl)-3-(4-meth-oxy-phen-yl)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, mol-ecules are linked by O-H⋯O hydrogen bonds, forming inversion dimers with an R 2 (2)(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.

3,5-Dimethyl-2,6-di-phenyl-piperidine.

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, mol-ecules are linked via C-H⋯π inter-actions, forming zigzag chains along [001].

[4-(4-Meth-oxy-phen-yl)-1-methyl-3-nitro-pyrrolidin-3-yl]methanol.

In the title compound, C13H18N2O4, the dihedral angle between the benzene and pyrrolidine (all atoms) rings is 70.6 (1)°. The pyrrolidine ring adopts a half-chair conformation. In the crystal, mol-ecules form chains along the c-axis direction linked by O-H⋯N hydrogen bonds, which are then connected by C-H⋯O inter-actions, forming a sheet parallel to the bc plane.

2-Chloro-1-(3,3-dimethyl-2,6-di-phenyl-piperidin-1-yl)ethanone.

In the title compound, C21H24ClNO, the piperidine ring adopts a chair conformation. The two phenyl rings are inclined to one another by 20.7 (1)°, and are inclined to the mean plane of the four planar atoms of the piperidine ring by 87.64 (10) and 70.8 (1)°. The mol-ecular structure features short intra-molecular C-H⋯Cl and C-H⋯O contacts. In the crystal, there are no significant inter-molecular inter-actions present.