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 A) 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.