Acta Crystallographica Section E
In the molecule of the title compound, C28H23N3O2, the nitro group is almost perpendicular to the carbazole ring to which it is attached. The crystal packing is determined by C—H⋯O and π–π interactions, where the nitrated carbazole ring of one molecule associates in a shifted parallel planar orientation with the centrosymmetrically related non-nitrated carbazole ring of a neighbouring molecule.
Asker, E., & Masnovi, J. (2006). 9-ethyl-3-(9H-9-ethylcarbazol-3-yl)-4-nitro-9H-carbazole. Acta Crystallographica Section E, 62(4), o1606-o1608. doi:10.1107/S1600536806010713