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Acta Cryst. (2012). E68, o2772-o2773
[ doi:10.1107/S1600536812036240 ]

1-Methyl-1'-(4-methylphenyl)-2',3',5',6',7',7a'-hexahydro-1'H-dispiro[piperidine-3,2'-pyrrolizine-3',3''-indoline]-4,2''-dione

S. Ramaswamy, R. Sribala, N. Srinivasan, R. V. Krishnakumar and R. R. Kumar

Abstract: The title compound, C₂₆H₂₉N₃O₂, crystallizes with two molecules in the asymmetric unit, having C-HO interactions between them and resulting in a dimer characterized by an R₂²(11) motif. These dimers are linked into an ABABAB chain via N-HO, N-HN and C-HO built edge-fused R₁²(5) and R₂²(7) motifs. This chain is linked to its inversion-related partner via N-HO bonds with an R²₂(8) motif and leads to a double chain extending along the b axis characterized by an R₆⁶(36) motif across the inversion centres. The methyl group of the phenyl ring and the oxindole of molecule A and B are involved in C-H [pi] interactions. One C atom of the pyrrolizine ring of molecule A and its attached H atoms show positional disorder, the major and minor components being in the ratio 0.706 (7):0.294 (7).