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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—H...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.

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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—H...O inter­actions link the mol­ecules, forming a two-dimensional network parallel to the bc plane.

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In the title compound, C26H18Cl2N2O5S, the carbazole ring system is essentially planar with a maximum deviation of 0.0498 (16) Å for the N atom. The carbazole ring system is almost orthogonal to the phenyl­sulfonyl and di­chloro-substituted nitro­phenyl rings, making dihedral angles of 84.23 (7) and 85.46 (12)°, respectively. The mol­ecular structure features intra­molecular C—H...O inter­actions, which generate two S(6) ring motifs. In the crystal, mol­ecules are linked by C—Cl...O halogen bonds [3.016 (3) Å, 166.63 (5)°], which generate infinite C(8) chains running parallel to [010].

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In the sterically hindered title compound, C26H17ClN2O6S, the carbazole ring has a maximum deviation from planarity of 0.067 (4) Å for the C atom connected to the aldehyde group. The carbazole moiety forms a dihedral angle of 72.8 (1)° with the nitro-substituted benzene ring. The O atom of the meth­oxy group deviates by 0.186 (1) Å from the adjacent carbazole moiety. The phenyl­sulfonyl group forms intra­molecular C—H...O bonds between sulfone O atoms and the carbazole moiety, resulting in two S(6) rings. In the crystal, the nitrated benzene rings are linked via C—H...O inter­actions forming infinite C(7) chains along [100]. The crystal packing is also characterized by C—H...π inter­actions, which result in inversion dimers.

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In the title compound, C25H15FN2O6S, the carbazole ring system is essentially planar, with a maximum deviation of 0.1534 (16) Å for the C atom connected to the 4-fluoro-2-nitro­phenyl ring. It is almost orthogonal to the phenyl­sulfonyl and nitro­phenyl rings, making dihedral angles of 88.45 (8) and 79.26 (7)°, respectively. The mol­ecular structure is stabilized by O—H...O and C—H...O hydrogen bonds, which generate three S(6) ring motifs. In the crystal, mol­ecules are linked by two C—H...O hydrogen bonds, which generate C(6) and C(9) chains running in the [100] and [010] directions, respectively, so forming a two-dimensional network lying parallel to (001). There are also supra­molecular R43(28) graph-set ring motifs enclosed within these networks.

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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—H...O hydrogen bonds. The chains are further linked by C—H...π inter­actions, forming layers parallel to the bc plane.

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In the title compound, C28H24N2O7S, the carbazole system is essentially planar, with a maximum deviation of 0.0644 (19) Å for the C atom connected to the 4,5-dimeth­oxy-2-nitro­phenyl group. The dihedral angle between the carbazole moiety and the dimethoxy-substituted nitrophenyl ring is 58.55 (7)°. The sulfonyl group forms two intra­molecular C—H...O bonds with the adjacent carbazole system, forming two cyclic S(6) motifs. In the crystal, mol­ecules are linked along the a axis in bands consisting of cyclic R33(15) motifs through two further C—H...O hydrogen bonds.

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In the title compound, C28H22N2O8S, the carbazole ring system is roughly planar, with a maximum deviation of 0.084 (3) Å for the C atom connected to the 4,5-dimeth­oxy-2-nitro­phenyl ring. The dihedral angle between the carbazole system and the dimeth­oxy-substituted nitro­phenyl ring is 57.05 (10)°. The aldehyde C atom deviates by 0.164 (5) Å from its attached carbazole ring system. The mol­ecular structure is stabilized by C—H...O inter­actions which generate two S(6) and one S(7) ring motif. In the crystal, mol­ecules are linked by C—H...O hydrogen bonds, forming R33(15) ring motifs, which are further crosslinked by R32(19) ring motifs, resulting in (002) layers. The crystal packing also features C—H...π inter­actions.

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In the title compound, C26H19BrN2O5S, the carbazole tricycle is essentially planar, with the largest deviation being 0.126 (3) Å for the C atom connected to the nitro­phenyl group. The carbazole moiety is almost orthogonal to the benzene rings of the adjacent phenyl­sulfonyl and nitro­phenyl groups, making dihedral angles of 85.43 (15) and 88.62 (12)°, respectively. The mol­ecular conformation is stabilized by two C—H...O hydrogen bonds involving the sulfone group, which form similar six-membered rings. In the crystal, mol­ecules symmetrically related by a glide plane are linked in C(6) chains parallel to [001] by C—H...O hydrogen bonds formed with the participation of the nitro group. The chains are reinforced by additional C—H...π inter­actions.

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The asymmetric unit of the title compound, C49H36O6·CHCl3, contains half an organic mol­ecule, the complete mol­ecule being generated by the operation of a crystallographic twofold rotation axis, and half a highly disordered chloro­form mol­ecule. The contribution to the diffraction pattern of the latter was removed using the program SQUEEZE in PLATON [Spek (2009). Acta Cryst. D65, 148–155]; the unit-cell characteristics take into account the presence of CHCl3. The dihedral angles between the planes of the naphthalene ring system and the meth­oxy­benzene rings are 71.05 (7) (syn to the central C=O group) and 57.27 (6)° (anti to the central C=O group). In the crystal, mol­ecules are linked by C—H...O inter­actions, generating C(12) chains running parallel to the b axis.

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The title compound, C28H18O2S, is composed of a naphthalene ring system fused with a benzo­thio­phene ring and attached to two phenyl rings. The phenyl rings make dihedral angles of 70.92 (8) and 79.23 (8)° with the essentially planar naphthalene ring system (r.m.s. deviation = 0.031 Å). There is an intra­molecular C—H...π inter­action present. In the crystal, mol­ecules are linked by C—H...O hydrogen bonds which generate C(7) zigzag chains running parallel to [10-1]. The chains are linked via further C—H...π inter­actions, forming a three-dimensional structure.
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