3,6-Di­chloro-9-(prop-2-yn-1-yl)-9H-carbazole

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.