2-Chloro-1-(2,4,4-trimethyl-2,3,4,5-tetra­hydro-1H-1,5-benzodiazepin-1-yl)ethanone

In the title compound, C₁₄H₁₉ClN₂O, the diazepine ring adopts a boat conformation. The Cl atom of the chloro­acetyl group is trans to the N atom of the diazepine ring. In the crystal, the mol­ecules form chains running along the diagonal of the ac plane through N—H...O hydrogen bonds.

r-2,c-6-Di­phenyl­piperidine

In the title compound, C₁₇H₁₉N, the piperidine ring adopts a chair conformation. The phenyl rings substituted at the 2- and 6-positions of the piperidine ring subtend dihedral angles of 81.04 (7) and 81.10 (7)° with the best plane of the piperidine ring. The crystal packing features C—H...π inter­actions.

3-Ethyl-cis-2,6-di­phenyl­piperidine

In the title compound, C₁₉H₂₃N, the piperidine ring adopts a chair conformation. The phenyl rings at the 2,6-positions of the piperidine ring occupy equatorial orientations. The crystal structure features C—H...π inter­actions.