Crystal structure of diethyl 3,3'-[(2,4-di-chloro-phen-yl)methyl-idene]bis-(1H-indole-2-carboxyl-ate).
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 perpendic-ular 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 intra-molecular C-H⋯π inter-actions affect the mol-ecular conformation. In the crystal, pairs of N-H⋯O hydrogen bonds link the mol-ecules into inversion dimers which are further linked into supra-molecular chains by N-H⋯O hydrogen bonds and short Cl-Cl contacts.
['Li|Yu-Long|YL|', 'Sun|Hong-Shun|HS|', 'Jiang|Hong|H|', 'Chen|Yu-Liang|YL|', 'Chen|Yang-Feng|YF|']
crystal structure MRI bis­indole contrast agent