Acta Crystallographica Section C

Crystal Structure Communications

Volume 63, Part 12 (December 2007)

organic compounds

sf3059 scheme

Acta Cryst. (2007). C63, o690-o692    [ doi:10.1107/S0108270107049621 ]

Two 9-[(E)-nitrophenylvinyl]-9H-carbazoles

M. Kubicki, W. Prukala and B. Marciniec

Abstract: The crystal structures of 9-[(E)-(4-nitrophenyl)vinyl]-9H-carbazole and 9-[(E)-(3-nitrophenyl)vinyl]-9H-carbazole, both C20H14N2O2, are determined mainly by van der Waals forces and [pi]-[pi] interactions between the carbazole and benzene systems. However, the packing modes are different. In the 4-nitro derivative, the molecules in the weakly bound stack are related by a unit-cell translation, while in the 3-nitro derivative there are centrosymmetric pairs of molecules joined by [pi]-[pi] interactions and also pairs of molecules, related by another centre of symmetry, connected by eight relatively short C-H...O interactions.

Formula: Two isomers of C20H14N2O2

hkldisplay filedownload file

Structure factor file (CIF format) (174.6 kbytes)
[ doi:10.1107/S0108270107049621/sf3059Isup2.hkl ]
Contains datablock I

hkldisplay filedownload file

Structure factor file (CIF format) (122.9 kbytes)
[ doi:10.1107/S0108270107049621/sf3059IIsup3.hkl ]
Contains datablock II


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