STRUCTURAL INVESTIGATIONS OF 1,2,3,4-TETRAHYDROCARBAZOLE DERIVATIVES .1. 2,3-DIHYDRO-9-(PHENYLSULFONYL)CARBAZOLE-4(1H)-ONE AND ,4-TETRAHYDRO-CARBAZOLE-1-SPIRO-2'-[1,3]DITHIOLANE
T. Hokelek et al., STRUCTURAL INVESTIGATIONS OF 1,2,3,4-TETRAHYDROCARBAZOLE DERIVATIVES .1. 2,3-DIHYDRO-9-(PHENYLSULFONYL)CARBAZOLE-4(1H)-ONE AND ,4-TETRAHYDRO-CARBAZOLE-1-SPIRO-2'-[1,3]DITHIOLANE, Acta crystallographica. Section C, Crystal structure communications, 50, 1994, pp. 450-453
Rings A and B of the title compounds, C18H15NO3S (1) and C14H15NS2 (2)
, are planar while the hydrogenated C rings are not. The rings in the
tetrahydrocarbazole skeleton are twisted with respect to each other.