Acta Crystallographica Section C

Crystal Structure Communications

Volume 59, Part 11 (November 2003)

sq1020 scheme

Acta Cryst. (2003). C59, o605-o608 [doi:10.1107/S0108270103020237]

3,5-Bis[4-(diethylamino)benzylidene]-1-methyl-4-piperidone and 3,5-bis[4-(diethylamino)cinnamylidene]-1-methyl-4-piperidone: prospective biophotonic materials

V. N. Nesterov, T. V. Timofeeva, S. S. Sarkisov, A. Leyderman, C. Y.-C. Lee and M. Yu. Antipin

Abstract: The structures of 3,5-bis[4-(diethylamino)benzylidene]-1-methyl-4-piperidone, C₂₈H₃₇N₃O, (I), and 3,5-bis[4-(diethylamino)cinnamylidene]-1-methyl-4-piperidone, C₃₂H₄₁N₃O, (II), have been characterized. Because of conjugation between donor and acceptor parts, the central heterocycles (including the carbonyl group) in (I) and (II) are flattened and exhibit a `sofa' conformation, with a deviation of the N atom from the planar fragment. The dihedral angles between the planar part of the heterocycle and the two almost flat fragments that include a phenyl ring and bridging atoms are 23.2 (1) and 11.2 (1)° in (I), and 11.8 (1) and 8.7 (2)° in (II). One- and two-photon absorption of light and the fluorescence of (I) and (II) have also been characterized.

Formula: C₂₈H₃₇N₃O and C₃₂H₄₁N₃O

Online 11 October 2003


	Structure factor file (CIF format) (260.5 kbytes) Contains datablock I

	Structure factor file (CIF format) (272.2 kbytes) Contains datablock II

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