6-[(E)-2-Phenyl­vin­yl]-1H-indole

The title compound, C₁₆H₁₃N, is essentially planar [maximum deviation from the least-squares plane = 0.081 (3) Å], with a dihedral angle of 1.65 (13)° between the planes of the indole and benzene rings. In the crystal, there are no significant inter­molecular π–π inter­actions [minimum ring centroid–centroid separation = 4.217 (5) Å].

6-Chloro­quinolin-2(1H)-one

In the title compound, C₉H₆ClNO, the Cl atom deviates by 0.142 (1) Å from the quinoline ring mean plane (r.m.s. deviation = 0.013 Å). In the crystal, N—H...O hydrogen bonds link the mol­ecules into [010] C(4) chains. Aromatic π–π stacking inter­actions [shortest centroid...centroid distance = 3.685 (3) Å] are also observed.