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