Crystal structure of diethyl 3,3′-[(2,4-dichlorophenyl)methylidene]bis(1H-indole-2-carboxylate)

In the title compound, C29H24Cl2N2O4, the mean planes of the two indole ring systems (r.m.s. deviations = 0.1249 and 0.0075 Å) are approximately perpendicular to one another, with a dihedral angle of 80.9 (5)° between them. The benzene ring is inclined to the mean planes of the two indole ring systems by 76.1 (3) and 78.3 (4)°. Weak intramolecular C—H...π interactions affect the molecular conformation. In the crystal, pairs of N—H...O hydrogen bonds link the molecules into inversion dimers which are further linked into supramolecular chains by N—H...O hydrogen bonds and short Cl—Cl contacts.