2-(4-Chloro-2-nitrophenyl)-9-phenylsulfonyl-9H-carbazole-3-carbaldehyde

In the title compound, C25H15ClN2O6S, the carbazole ring system is essentially planar, with a maximum deviation of 0.152 (3) Å for the C atom to which the 4-chloro-2-nitrophenyl ring is attached. Its mean plane is almost orthogonal to the phenylsulfonyl and nitrophenyl rings, making dihedral angles of 82.64 (14) and 79.89 (13)°, respectively. The N atom of the nitro group deviates by 0.032 (3) Å from the benzene ring to which it is attached. The molecular structure features intramolecular O-H...O and C-H...O hydrogen bonds, which generate three S(6) ring motifs. In the crystal, molecules are linked by C-H...O hydrogen bonds, which generate C(6) and C(9) chains running in the [100] and [010] directions, respectively, forming a two-dimensional network lying parallel to (001). There are also R43(28) supramolecular graph-set ring motifs enclosed within these networks.