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In the title compound, C19H13BrN2O5, the spiro furan ring is almost planar with a maximum deviation of 0.034 (2) Å. The indole unit and the furan ring are normal to each other, making a dihedral angle of 87.82 (8) °. The mol­ecular structure is stabilized by an intra­molecular N—H...O hydrogen bond, which generates an S(6) ring motif. In the crystal, mol­ecules are linked via pairs of N—H...O hydrogen bonds, forming inversion dimers enclosing R22(8) ring motifs.

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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, C30H30Cl2N2O3, the indole ring system is roughly planar, with a maximum deviation of 0.1039 (18) Å for the carbonyl C atom, and makes a dihedral angle of 86.61 (9)° with the mean plane of the pyrrolidine ring. This spiro pyrrolidine ring adopts an envelope conformation with the N atom at the flap position. The pyrrole ring of the indole ring system adopts a twisted conformation on the C—C(=O) bond. The mol­ecular structure is stabilized by an intra­molecular C—H...O hydrogen bond, which generates an S(6) ring motif, and a π–π inter­action [centroid–centroid distance = 3.6577 (12) Å] involving the 2,4-di­chloro­phenyl ring and the benzyl ring. In the crystal, mol­ecules are linked via C—H...O hydrogen bonds, forming C(9) chains running parallel to [10-1].

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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, C29H29BrN2O3, the indole ring system is essentially planar (r.m.s. deviation = 0.079 Å) and makes a dihedral angle of 85.23 (10)° with the mean plane of the 4-methyl­pyrrolidine ring. This ring adopts an envelope conformation with the N atom at the flap. The pyrrolidine ring of the indole ring system adopts a twisted conformation on the C—C(=O) bond. The mol­ecular structure is stabilized by an intra­molecular C—H...O hydrogen bond, which generates an S(6) ring motif. In the crystal, mol­ecules are linked via pairs of C—H...O hydrogen bonds, forming inversion dimers with an R22(14) ring motif. These dimers are further linked by N—H...O and C—H...O hydrogen bonds, forming two-dimensional networks lying parallel to (10-1).

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In the title compound, C27H24Cl2N2O3, the indole ring system is essentially planar, with a maximum deviation of 0.082 (2) Å for the carbonyl C atom. It makes a dihedral angle of 88.53 (6)° with the mean plane of the 4-methyl­pyrrolidine ring, which adopts an envelope conformation with the N atom at the flap position. The mol­ecular structure is stabilized by intra­molecular C—H...O hydrogen bonds, which generate S(6) and S(7) ring motifs, and an intra­molecular π–π inter­action involving the benzyl and di­chloro-substituted benzene rings [centroid–centroid distance = 3.6291 (11) Å]. In the crystal, mol­ecules are linked via N—H...O hydrogen bonds, forming C(7) chains running parallel to [10-1].

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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 solvate, C29H30N2O3·CHCl3, the dihedral angle between the indole ring system (r.m.s. deviation = 0.050 Å) and the 4-methyl­pyrrolidine ring is 88.88 (8)°. The latter ring adopts an envelope conformation with the N atom as the flap. Its mean plane makes dihedral angles of 86.94 (11) and 42.08 (9)° with the phenyl and di­methyl­benzene rings, respectively. The mol­ecular conformation is stabilized by intra­molecular C—H...O hydrogen bonds, which generate S(6) and S(9) ring motifs. The chloro­form solvent mol­ecule is linked to the organic mol­ecule by a C—H...O hydrogen bond involving the carbonyl O atom of the carboxyl­ate group. In the crystal, mol­ecules are linked via bifurcated N—H...(N,O) and C—H...O hydrogen bonds, forming chains propagating along [001].

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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, C18H19BrN2O4, the chromene unit is not quite planar (r.m.s. deviation = 0.199 Å), with the methyl C atoms lying 0.027 (4) and 1.929 (4) Å from the mean plane of the chromene unit. The six-membered carbocyclic ring of the chromene moiety adopts an envelope conformation, with the dimethyl-substituted C atom as the flap. The methyl­amine and nitro groups are slightly twisted from the chromene moiety, with C—N—C—O and O—N—C—C torsion angles of 2.7 (4) and −0.4 (4)°, respectively. The dihedral angle between the mean plane of the chromene unit and the benzene ring is 85.61 (13)°. An intra­molecular N—H...O hydrogen bond generates an S(6) ring motif, which stabilizes the mol­ecular conformation. In the crystal, mol­ecules are linked via N—H...O hydrogen bonds, forming hexa­gonal rings lying parallel to the ab plane. A region of disordered electron density, most probably disordered ethanol solvent mol­ecules, occupying voids of ca 432 Å3 for an electron count of 158, was treated using the SQUEEZE routine in PLATON [Spek (2009). Acta Cryst. D65, 148–155]. Their formula mass and unit-cell characteristics were not taken into account during refinement.

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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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In the title compound, C11H10O4, the methyl acrylate sub­stituent adopts an extended E conformation with all torsion angles close to 180°. The conformation of the keto group with respect to the olefinic double bond is typically S-trans. In the crystal, mol­ecules are linked via pairs of C—H...O hydrogen bonds, forming inversion dimers with an R22(8) graph-set motif. The dimers are further linked via C—H...O hydrogen bonds, forming chains along [001], which enclose R32(16) graph-set ring motifs. The keto group O atomaccepts two C—H...O interactions.

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In the title compound, C19H22N2O4, the six-membered cyclo­hexenone ring of the chromene unit adopts an envelope conformation, with the dimethyl-substituted C atom as the flap, while the pyran ring has a boat conformation. These two mean planes are inclined to one another by 6.65 (13)°·The benzene ring is normal to the 4H-chromene moiety mean plane, making a dihedral angle of 89.18 (5)°. The methyl­amine and nitro groups are slightly twisted from the chromene moiety mean plane, with torsion angles C—N—C—O = 1.70 (18) and O—N—C—C = 0.15 (18)°. The mol­ecular structure is characterized by an intra­molecular N—H...O hydrogen bond, which generates an S(6) ring motif. In the crystal, mol­ecules are linked via pairs of weak C—H...O hydrogen bonds, forming inversion dimers. These dimers are connected by further C—H...O hydrogen bonds, forming sheets lying parallel to (10-1).

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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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In the title compound, C19H22N2O5, the six-membered carbocyclic ring of the chromene moiety adopts an envelope conformation with the dimethyl-substituted C atom as the flap. The pyran ring has a flat-boat conformation. The meth­oxy­phenyl ring is orthogonal to the mean plane of the chromene moiety, with a dihedral angle of 89.97 (8)°. The amine N atom deviates from the chromene mean plane by 0.1897 (16) Å. The methyl­amine and the nitro group are involved in an intra­molecular N—H...O hydrogen bond which generates an S(6) ring motif. They are slightly twisted out of the plane of the chromene moiety with torsion angles of C—N—C—O(pyran) = 2.2 (3)° and O(nitro)—N—C—C = −5.6 (2)°. In the crystal, there are only C—H...π inter­actions present, forming inversion-related dimers.

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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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