Abstract
A second, monoclinic, polymorph of the title compound, C(14)H(8)Cl(2), 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.
Highlights
Crystal Structure Communications the structure using current methods, low-temperature data of the orthorhombic form were collected using a modern diffractometer equipped with an area detector
One of the starting materials used in the context of our ongoing research into energy transfer in ternary complexes is the title compound, 1,8-dichloroanthracene, (I)
The orthorhombic structure of (I) had originally been reported without coordinates by Desvergne et al (1978) and was determined in the space group Pnma from Weissenberg photographs collected at room temperature
Summary
This article is available at DigitalCommons@URI: https://digitalcommons.uri.edu/chm_facpubs/123 organic compounds
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