Methyl (2Z)-2-[(2-formyl-3-methyl-1H-indol-1-yl)meth­yl]-3-(4-meth­oxy­phen­yl)prop-2-enoate

In the title indole derivative, C₂₂H₂₁NO₄, the dihedral angle between the benzene and pyrrole rings of indole moiety is 1.8 (1)°. The plane of the 4-meth­oxy­phenyl ring is oriented with a dihedral angle of 60.7 (1)° with respect to the plane of the indole moiety. The mol­ecular packing is stabilized by C—H...O hydrogen bonds which form a V-shaped chain arrangement along the bc plane of the unit cell. In addition to this, C—H...π and π–π inter­actions [centroid–centroid distances = 3.8102 (11) and 3.8803(12) Å], which run along the b-axis direction, stabilize the mol­ecular packing.

Crystal structure of (E)-2-(4-meth­oxy­styr­yl)-2,3-di­hydro-1H-perimidine aceto­nitrile monosolvate

The title compound, C₂₀H₁₈N₂O·CH₃CN, a perimidine deriv­ative, crystallized as an aceto­nitrile monosolvate. The planes of the naphthalene ring system and the meth­oxy­phenyl ring are oriented almost perpendicular to one another, with a dihedral angle of 87.61 (6)°. The conformation about the C=C bond is E. The hexa­hydro­pyrimidine ring has an envelope conformation, with the methine C atom as the flap. In the crystal, the mol­ecules are linked by N—H...N hydrogen bonds involving the aceto­nitrile solvent mol­ecule as acceptor, forming zigzag chains propagating along [100].

Crystal structure of 9-butyl-3-(9-butyl-9H-carbazol-3-yl)-9H-carbazole

In the title carbazole derivative, C₃₂H₃₂N₂, the mol­ecule resides on a crystallographic twofold axis, which runs through the central C—C bond. The carbazole ring system is almost planar, with a maximum deviation of 0.041 (1) Å for one of the ring-junction C atoms. The crystal packing is stabilized by C—H...π inter­actions only, which form a C(7) chain-like arrangement along [110] in the unit cell.