2-Chloro-7,8,9,10-tetra­hydro­cyclo­hepta­[b]indol-6(5H)-one

In the title molecule, C13H12ClNO, the dihedral angle between the benzene and pyrrole rings is 1.38 (9)°. The cycloheptene ring adopts a distorted twist chair and sofa conformation. Intermolecular N—H...O hydrogen bonds form an R 2 2(10) loop in the crystal packing. Further, weak C—H...O and C—H...π (involving the benzene ring) interactions are found in the crystal structure.