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Acta Cryst. (2013). E69, o924-o925
[ doi:10.1107/S1600536813012889 ]


M.-H. Huang, Y.-C. Gao, F.-L. Yang and Y.-J. Luo

Abstract: In the title molecule, C26H17N3O2, both indole ring systems are essentially planar, with maximum deviations of 0.019 (2) and 0.033 (1) Å for the N atoms, and form dihedral angles of 34.40 (9) and 45.06 (8)° with the essentially planar pyrrole ring [maximum deviation = 0.020 (2) Å]. The dihedral angle between the two indole ring systems is 58.78 (6)°. In the crystal, molecules are connected by pairs of N-H...O hydrogen bonds, forming inversion dimers and generating R22(8) rings. Weak [pi]-[pi] stacking interactions, with a centroid-centroid distance of 3.983 (2) Å, are also observed.

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