2-(4-Chloro­phen­yl)-2,3-di­hydro­quinolin-4(1H)-one

The title mol­ecule, C₁₅H₁₂ClNO, features a di­hydro­quinolin-4(1H)-one moiety attached to a chloro­benzene ring. The heterocyclic ring has a half-chair conformation with the methine C atom lying 0.574 (3) Å above the plane of the five remaining atoms (r.m.s. deviation = 0.0240 Å). The dihedral angles between the terminal benzene rings is 77.53 (9)°, indicating a significant twist in the mol­ecule. In the crystal, supra­molecular zigzag chains along the c-axis direction are sustained by N—H...O hydrogen bonds. These are connected into double chains by C—H...π inter­actions.

2-p-Tolyl-2,3-di­hydro­quinolin-4(1H)-one

In the title mol­ecule, C₁₆H₁₅NO, the tetra­hydro­pyridine ring is in a sofa conformation with the methine C atom forming the flap. The dihedral angle between the benzene rings is 80.85 (8)°. In the crystal, mol­ecules are arranged in alternating double layers parallel to (100) and are connected along [001] by N—H...O hydrogen bonds. In addition, weak C—H...π inter­actions are observed.