Acta Cryst. (2012). E68, o3345
[ doi:10.1107/S1600536812046144 ]

4'-Methyl-14',19'-dioxa-4'-azaspiro[acenaphthylene-1,5'-tetracyclo[18.4.0.0^2,6.0^8,13]tetracosane]-1'(24'),8',10',12',20',22'-hexaene-2,7'(1H)-dione

S. Narayanan, T. Srinivasan, S. Purushothaman, R. Raghunathan and D. Velmurugan

Abstract: In the title compound, C₃₃H₂₉NO₄, the acenaphthylene ring system is essentially planar (r.m.s. deviation = 0.0290 Å). The pyrrolidine ring adopts a C-envelope conformation with a C atom displaced by 0.671 (2) Å from the mean-plane formed by the remaining ring atoms. The pyrrolidine ring is fused to acenaphthylene ring system making a dihedral angle of 88.0 (7)°. In the crystal, molecules are linked into R²₂(9) dimers via C-HN and C-HO hydrogen bonds. Two C atoms act as donors to the same O atom acceptor, resulting in the formation of R²₁(7) ring motifs. These two motifs combine to form hydrogen-bonded sheets running along the a- and b-axis directions.

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