Acta Crystallographica Section C

Crystal Structure Communications

Volume 69, Part 2 (February 2013)


organic compounds



gz3224 scheme

Acta Cryst. (2013). C69, 199-203    [ doi:10.1107/S0108270113001790 ]

Two polymorphs of 1,8-dichloroanthracene

P. Müller, F. R. Fronczek, S. J. Smith, T. Mako and M. Levine

Abstract: A second, monoclinic, polymorph of the title compound, C14H8Cl2, has been found. In addition to the structure of this monoclinic form, the structure of the previously described orthorhombic form [Desvergne, Chekpo & Bouas-Laurent (1978). J. Chem. Soc. Perkin Trans. 2, pp. 84-87; Benites, Maverick & Fronczek (1996). Acta Cryst. C52, 647-648] has been redetermined at low temperature and using modern methods. The low-temperature structure of the orthorhombic form is of significantly higher quality than the previously published structure and additional details can be derived. A comparison of the crystal packing of the two forms with a focus on weak intermolecular C-H...Cl interactions shows the monoclinic structure to have one such interaction linking the molecules into infinite ribbons, while two crystallographically independent C-H...Cl interactions give rise to an interesting infinite three-dimensional network in the orthorhombic crystal form.

Formula: Two polymorphs of C14H8Cl2


cdxdisplay filedownload file

Chemdraw file (2.4 kbytes)
[ doi:10.1107/S0108270113001790/gz3224I_monosup3.cdx ]
Supplementary material


cmldisplay filedownload file

Chemical Markup Language (CML) file (4.0 kbytes)
[ doi:10.1107/S0108270113001790/gz3224I_monosup4.cml ]
Supplementary material


cdxdisplay filedownload file

Chemdraw file (2.4 kbytes)
[ doi:10.1107/S0108270113001790/gz3224I_orthosup6.cdx ]
Supplementary material


cmldisplay filedownload file

Chemical Markup Language (CML) file (4.0 kbytes)
[ doi:10.1107/S0108270113001790/gz3224I_orthosup7.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.

 bibliographic record in  format

  Find reference:   Volume   Page   
  Search:     From   to      Advanced search

Copyright © International Union of Crystallography
IUCr Webmaster