(IUCr) Crystallography Journals Online

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Acta Cryst. (2013). E69, o140-o141
[ doi:10.1107/S1600536812051094 ]

rac-5''-(4-Fluorobenzylidene)-1'-(4-fluorophenyl)-1''-methyl-1',2',3',5',6',7',8',8a'-octahydrodispiro[acenaphthylene-1,3'-indolizine-2',3''-piperidine]-2,4''(1H)-dione

J. Suresh, R. A. Nagalakshmi, S. Sivakumar, R. R. Kumar and P. L. N. Lakshman

Abstract: In the title E isomer of the racemic compound, C₃₇H₃₂F₂N₂O₂, the pyridinone ring adopts a twisted half-chair conformation with the N atom deviating by -0.355 (3) Å and with the methylene C atom next to octahydroindolizine moiety deviating by 0.415 (3) Å from the mean plane defined by other four atoms. In the octahydroindolizine system, the pyrrolidine ring exhibits an envelope conformation with the fused methyne C atom deviating by 0.6496 (1) Å from the mean plane defined by four other atoms, and the piperidine ring exhibits a distorted chair conformation as evident from the puckering parameters Q = 0.568 (2) Å, [theta] = 1.0 (2) and [Phi] = 256 (11)°. In the crystal, C-HO interactions connect the molecules into chains along [101].