Crystal structure of 1-(2-chloro-acet-yl)-3,3-dimethyl-2,6-di-p-tolyl-piperidin-4-one.

In the title compound, C23H26ClNO2, the piperidin-4-one ring adopts a distorted boat conformation. The two p-tolyl rings are nearly normal to each other, making a dihedral angle of 83.33 (10)°. They are inclined to the mean plane of the piperidine ring by 73.2 (1) and 87.22 (9)°. In the crystal, there are no significant inter-molecular inter-actions present.

Crystal structure of 1-(2-chloro-acet-yl)-2,6-bis-(4-fluoro-phen-yl)-3,3-di-methyl-piperidin-4-one.

In the title mol-ecule, C21H20ClF2NO2, the piperidine ring adopts a slightly distorted boat conformation. The two benzene rings form a dihedral angle of 87.43 (1)°. A weak intra-molecular C-H⋯π inter-action is observed. In the crystal, weak C-H⋯O hydrogen bonds and weak C-H⋯π inter-actions connect the mol-ecules, forming a three-dimensional network.

Ethyl 2-[2-(2,4-diphenyl-3-aza-bicyclo-[3.3.1]nonan-9-yl-idene)hydrazin-1-yl]-4-methyl-1,3-thia-zole-5-carboxyl-ate di-methyl-formamide monosolvate.

In the title mol-ecule, C27H30N4O2S·C3H7NO, the fused piperidine and cyclo-hexane rings adopt a twin chair conformation and the phenyl groups occupy equatorial sites. The phenyl rings make a dihedral angle of 40.74 (2)°. In the crystal, the di-methyl-formamide solvent mol-ecule is connected to the main mol-ecule by an N-H⋯O hydrogen bond. An additional N-H⋯O hydrogen bond connects mol-ecules into chains along [100]. Pairs of weak C-H⋯O hydrogen bonds connect inversion-related chains. The ethyl group was refined as disordered over two sets of sites with an occupancy ratio of 0.660 (17):0.340 (17).