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In the title compound, C22H15N3O, the dihedral angle between the two indole units is 33.72 (3)°. The molecular structure features a weak intramolecular C—H
N interaction. In the crystal, weak C—HO and C—Hπ interactions, forming a two-dimensional network parallel to the bc plane.
N interaction. In the crystal, weak C—HO and C—Hπ interactions, forming a two-dimensional network parallel to the bc plane.organic compoundsOpen access
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In the title compound, C25H20N2O5S, the phenyl ring makes dihedral angles of 89.88 (8) and 13.98 (8)°, respectively, with the indole ring system and the nitrobenzene ring. The dihedral angle between the indole ring system and the nitrobenzene ring is 88.48 (11)°. The molecular structure is stabilized by a weak intramolecular C—HO interaction. In the crystal, π–π interactions, with centroid–centroid distances of 3.6741 (18) and 3.8873 (17) Å, link the molecules into layers parallel to the ab plane.
O interaction. In the crystal, π–π interactions, with centroid–centroid distances of 3.6741 (18) and 3.8873 (17) Å, link the molecules into layers parallel to the ab plane.organic compoundsOpen access
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In the title compound C24H17BrN2O5S, the phenyl ring makes dihedral angles of 85.4 (2) and 8.8 (2)° with the indole ring system and the nitrobenzene ring, respectively, while the indole ring system and nitrobenzene ring make a dihedral angle of 80.1 (2)°. In the crystal, weak C—HO interactions link the molecules, forming a two-dimensional network parallel to the bc plane.
O interactions link the molecules, forming a two-dimensional network parallel to the bc plane.organic compoundsOpen access
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In the title compound C20H13N5, the dihedral angle between the carbazole ring system (r.m.s. deviation = 0.027 Å) and the pendant benzene ring is 55.08 (6)°. One of the azide N atoms is disordered over two positions in a 0.65 (2):0.35 (2) ratio. In the crystal, aromatic π–π stacking is observed [minimum centroid–centroid separation = 3.6499 (13) Å] as well as inversion-dimers connected by pairs of weak C—Hπ interactions.
π interactions.organic compoundsOpen access
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In the title compound, C17H14BrNO3S, the phenyl ring makes a dihedral angle of 89.78 (16)° with the plane of the indole ring system. The terminal Br atom and the methyl group are disordered over two sets of sites, with site occupancies of 0.860 (2) and 0.140 (2). In the crystal, molecules are linked into a chain along the b-axis direction by weak C—HO hydrogen bonds. The chains are further linked by C—Hπ interactions, forming layers parallel to the bc plane.
O hydrogen bonds. The chains are further linked by C—Hπ interactions, forming layers parallel to the bc plane. 
