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Acta Cryst. (2013). E69, o825-o826
[ doi:10.1107/S1600536813011501 ]

Methyl 5''-chloro-1',1''-dimethyl-2,2''-dioxodispiro[indoline-3,2'-pyrrolidine-3',3''-indoline]-4'-carboxylate

P. S. Kannan, P. S. Yuvaraj, K. Manivannan, B. S. R. Reddy and A. SubbiahPandi

Abstract: In the title compound, C22H20ClN3O4, the central pyrrolidine ring adopts an envelope conformation on the N atom. The indolinone systems are individually roughly planar, with maximum deviations from their mean planes of 0.130 Å for the spiro C atom of the indolinone unit and 0.172 Å for the carbonyl C atom of the 5-chloro-1-methylindolinone unit. They make dihedral angles of 77.7 (8) and 86.1 (8)° with the mean plane through the central pyrrolidine ring. In the crystal, molecules are linked by N-H...O hydrogen bonds supported by C-H...O contacts into chains along the ab diagonal. The structure also features C-H...O hydrogen bonds, forming R22(8) and R22(16) rings and generating a three-dimensional array.

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