Two polymorphs of 1,8-dichloro­anthracene

Authors

Peter Müller
Frank R. Fronczek
Stacey J. Smith
Teresa Mako, University of Rhode Island
Mindy Levine, University of Rhode IslandFollow

Document Type

Article

Date of Original Version

2013

Department

Chemistry

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-HCl inter­actions shows the monoclinic structure to have one such inter­action linking the mol­ecules into infinite ribbons, while two crystallographically independent C-HCl interactions give rise to an inter­esting infinite three-dimensional network in the ortho­rhom­bic crystal form.

Citation/Publisher Attribution

Müller, P., Fronczek, F. R., Smith, S. J., Mako, T., & Levine, M. (2013). Two polymorphs of 1,8-dichloro­anthracene. Acta. Cryst., C69, 199-203. doi: 10.1107/S0108270113001790

Available at: https://doi.org/10.1107/S0108270113001790