Acta Cryst. (2005). E61, o2267-o2269  [ doi:10.1107/S1600536805019276 ]

Ethyl 2,2''-dioxo-2',3',5',6',7',7a'-hexahydroacenaphthene-1-spiro-3'-1'H-pyrrolizine-2'spiro-1''-acenaphthene-1-carboxylate

G. Usha, S. Selvanayagam, D. Velmurugan, K. Ravikumar, R. R. Durga and R. Raghunathan

Abstract: In the title compound, C₃₂H₂₅NO₄, the mean plane through the pyrrolizidine system is almost perpendicular [dihedral angle 88.9  (1)°] to that through one of the acenaphthene units, and the dihedral angle between the pyrrolizidine and the second acenaphthene system is 81.6  (1)°. In the pyrrolizidine system, one of the rings is in a half-chair conformation while the other is in an envelope conformation. The overall conformation is twisted about the fusion bond. The crystal structure is stabilized by a C-HO intermolecular hydrogen bond.

Online 24 June 2005

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