Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 10 (October 2013)

organic compounds

Acta Cryst. (2013). E69, o1585    [ doi:10.1107/S1600536813025890 ]


S. A. Inglebert, Y. Arun, K. Sethusankar and P. T. Perumal

Abstract: In the title compound, C26H20N4O2S, the central pyrrolidine ring adopts a twist conformation on the C-C bond involving the spiro C atom. Its mean plane makes dihedral angles of 78.83 (14), 65.91 (15) and 44.49 (18)° with the mean planes of the adjacent oxindole ring system, the indole system and the thio­phene ring, respectively. The indole and indoline units are essentially planar, with maximum deviations of 0.019 (3) and 0.090 (3) Å, respectively. In the oxindole fused-ring system, the pyrrole ring adopts an envelope conformation with the spiro C atom as the flap. In the crystal, pairs of N-H...O hydrogen bonds link the mol­ecules, forming inversion dimers with an R22(8) ring motif. The dimers are linked by further N-H...O hydrogen bonds, forming a two-dimensional network lying parallel to (100).

CCDC reference: 962054

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