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

In the title compound, C(29)H(25)FN(2)O(4), the mean planes of the two indole ring systems (r.m.s. deviations = 0.1392 and 0.0115 Å) are approximately perpendicular to one another, subtending a dihedral angle of 86.0 (5)°; the benzene ring is twisted with respect to the mean planes of the two indole ring systems by 83.3 (2) and 88.1 (4)°, respectively. In the crystal, pairs of N—H⋯O hydrogen bonds link the mol­ecules into centrosymmetric dimers, which are further linked by N—H⋯O hydrogen bonds into supra­molecular chains propagating along the [101] direction.