9-(4-Nitrophenylsulfonyl)-9H-carbazole

In the title molecule, C18H12N2O4S, the carbazole skeleton is nearly planar [maximum deviation = 0.037 (1) A] and is oriented at a dihedral angle of 73.73 (5)degrees with respect to the benzene ring. An intramolecular C-H...O hydrogen bond links a nitro O atom to the carbazole skeleton. In the crystal, intermolecular C-H...O hydrogen bonds link the molecules into a three-dimensional network. pi-pi contacts between inversion-related benzene rings [centroid-centroid distance = 3.7828 (8) A] and two weak C-H...pi interactions may also stabilize the structure.