2-Iodo-3-(4-meth­oxy­anilino)-5,5-dimethyl­cyclo­hex-2-en-1-one

The cyclo­hexene ring in the title compound, C₁₅H₁₈INO₂, adopts a sofa conformation. The dihedral angle between the cyclo­hexene (through all ring atoms) and benzene rings is 63.3 (1)°. The mol­ecular conformation features an N—H...I short contact and the crystal packing features C—H...O hydrogen bonds.

(E)-3-Phenyl-2-(1-tosyl-1H-indol-3-ylcarbon­yl)acrylonitrile

In the title compound, C₂₅H₁₈N₂O₃S, the indole moiety is planar and makes a dihedral angle of 89.95 (09)° with the phenyl ring of the sulfonyl substituent. The mol­ecular conformation features a weak C—H...N short contact and the crystal packing reveals a weak C—H...O hydrogen bond.

3-(1,2-Di-p-tolyl­vin­yl)-2-methyl-1H-indole

In the title compound, C₂₅H₂₃N, the indole unit makes a dihedral angles of 79.03 (5) and 61.82 (4)° with the benzene rings. No classical hydrogen bonds are found in the crystal structure.

1′-Butyl-2-methyl-1′,2,2′,3,4,9-hexa­hydro­spiro­[benzo[f]isoindole-1,3′-indole]-2′,4,9-trione

In the title compound, C₂₄H₂₂N₂O₃, the indoline and pyrrole-fused naphtho­quinone units are both essentially planar [r.m.s. deviations = 0.042 (3) and 0.133 (3) Å, respectively]. The pyrrole ring adopts a C-envelope conformation. The dihedral angle between the mean planes of the two five-membered rings is 89.94 (9)°. The O atoms deviate from the mean planes of the pyrrolidine and naphthalene rings by 0.0311 (2), 0.2570 (2) and 0.1669 (2) Å. In the crystal, C—H...O inter­actions generate dimers with R₂²(16) and R₂²(18) graph-set motifs. The carbonyl O atom is involved in bifurcated hydrogen bonding. C—H...π inter­actions also occur.