Acta Cryst. (2013). E69, o235
[ doi:10.1107/S1600536813000470 ]

rac-Methyl (1R,3'S)-1',1''-dimethyl-2,2''-dioxo-2H-dispiro[acenaphthylene-1,2'-pyrrolidine-3',3''-indoline]-4'-carboxylate

G. Ganesh, P. S. Yuvaraj, C. Divakara, B. S. R. Reddy and A. SubbiahPandi

Abstract: In the title compound, C₂₆H₂₂N₂O₄, the pyrrolidine ring adopts a twisted conformation and the other five-membered rings adopt envelope conformations with the spiro C atoms as the flap atoms. The naphthalene ring system of the dihydroacenaphthylene group forms dihedral angles of 89.2 (9) and 75.5 (6)° with the pyrrolidine and indole rings, respectively. The pyrrolidine ring makes a dihedral angle of 80.1 (9)° with the indole ring. In the crystal, molecules are linked by weak C-HO hydrogen bonds, forming chains along the b-axis direction.

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