organic compounds
Open access
The tricyclic aromatic ring system of the title compound, C15H9Cl2N, is essentially planar (r.m.s. deviation = 0.002 Å). The two Cl atoms lie slightly out of the plane of the carbazole ring system, with the C—Cl bonds forming angles of 1.23 (8) and 1.14 (8)° with the plane. The acetylene group has a syn orientation with respect to the ring system. In the crystal, no weak hydrogen bonds nor any π–π stacking interactions are observed.
organic compounds
Open access
In the title compound, C15H10ClN3O2, the benzene ring is slightly twisted out of the plane of the 2,3-dihydro-1H-indole ring system (r.m.s. deviation = 0.007 Å), forming a dihedral angle of 7.4 (3)°. An intramolecular N—HO hydrogen bond forms a six-membered ring. In the crystal, molecules are linked via N—HO and C—HO hydrogen bonds, forming layers alternately perpendicular to [011] and [0-11].