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In the title compound, C17H24N2O5S2, the indole ring system is nearly planar [maximum deviation = 0.032 (1) Å] and the cyclo­hexene ring has a half-chair conformation. In the crystal, N—H...O hydrogen bonds link the mol­ecules into a chain running along the b-axis direction. Weak C—H...O hydrogen bonds and weak C—H...π inter­actions are observed between the chains.

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In the title compound, C17H17NO2, the carbazole skeleton includes an eth­oxy­carbonyl group at the 3-position. The indole three-ring system is almost planar [maximum deviation = 0.065 (2) Å], and the ethyl ester group is inclined to its mean plane by 15.48 (2)°. In the crystal, there are π–π stacking inter­actions between parallel benzene rings and between parallel benzene and pyrrole rings of adjacent mol­ecules [centroid–centroid distances = 3.9473 (8) and 3.7758 (8) Å, respectively]. Weak C—H...π inter­actions are also present.

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In the title compound, C15H15NO, the carbazole skeleton includes a methanol group at the 3-position. The indole ring system is almost planar [maximum deviation = 0.045 (2) Å]. In the crystal, O—H...O hydrogen bonds link the mol­ecules into zigzag chains along the b-axis direction. There are weak C—H...π inter­actions within the chains and linking neighbouring chains forming sheets lying parallel to (001).
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