Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 3 (March 2013)

organic compounds

yk2078 scheme

Acta Cryst. (2013). E69, o376 [ doi:10.1107/S1600536813003206 ]

6,7-Difluoro-1,2,3,4-tetrahydroquinoxaline-5,8-dicarbonitrile

B.-H. Qu, X.-C. Jia, J. Li and M.-Y. He

Abstract: In the title compound, C₁₀H₆F₂N₄, the C_ar-N bonds are slightly shortened with respect to a standard aniline C-N bond [1.3580 (16) and 1.3618 (16) versus 1.39 Å], thus indicating some [pi] - [pi] conjgation with the electron-acceptor CN groups. The molecule, except for two C atom of the ethylene bridge, is nearly planar, the largest deviation of the other non-H atoms from the mean plane being 0.309 (2) Å. The N-C-C-N torsion angle involving the ethylene bridge is 50.23 (18)°. In the crystal, molecules are connected by pairs of N-HN hydrogen bonds into chains along [21-1].


	Hyper-Text Markup Language (HTML) file [ doi:10.1107/S1600536813003206/yk2078sup0.html ] Supplementary materials

	Chemical Markup Language (CML) file (3.8 kbytes) [ doi:10.1107/S1600536813003206/yk2078Isup3.cml ] Supplementary material

Notes:

To open or display or play some files, you may need to set your browser up to use the appropriate software. See the full list of file types for an explanation of the different file types and their related mime types and, where available links to sites from where the appropriate software may be obtained.

The download button will force most browsers to prompt for a file name to store the data on your hard disk.

Where possible, images are represented by thumbnails.

Search: From to Advanced search