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Acta Cryst. (2013). E69, o256-o257
[ doi:10.1107/S1600536813001177 ]

5''-(4-Methoxybenzylidene)-1'-(4-methoxyphenyl)-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 compound, C39H38N2O4, the pyridinone ring adopts a twisted half-chair conformation with the N atom deviating by 0.3304 (1) and with the methylene C atom adjacent to the octahydroindolizine unit deviating by 0.444 (3) Å from the mean plane defined by the other four atoms. In the octahydroindolizine system, the pyrrolidine ring exhibits an envelope conformation, with the fused methyne C atom deviating by 0.6315 (1) Å from the mean plane defined by the other four atoms, and the piperidine ring exhibits a distorted chair conformation, as reflected in the puckering parameters Q = 0.568 (4) Å, [theta] = 1.5 (4) and [varphi] = 161 (16)°. In the crystal pairs of weak C-H...O interactions form centrosymmetric dimers, which are further connected by C-H...[pi] interactions. The crystal studied was a non-merohedral twin, with a domain ratio of 0.91:0.09.


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