Crystal structure of 4,5-di-bromo-phenanthrene.
Acta Crystallogr E Crystallogr Commun
; 73(Pt 4): 539-542, 2017 Apr 01.
Article
en En
| MEDLINE
| ID: mdl-28435716
The synthesis and crystal structure of the title compound, C14H8Br2, is described. The mol-ecule is positioned on a twofold rotation axis and the asymmetric unit consists of half a mol-ecule with the other half being generated by symmetry. The presence of two large bromine atoms in the bay region significantly distorts the mol-ecule from planarity and the mean planes of the two terminal rings of the phenanthrene system are twisted away from each other by 28.51â
(14)°. The torsion angle between the two C-Br bonds is 74.70â
(14)° and the distance between the two Br atoms is 3.2777â
(13)â
Å. The mol-ecules pack in layers in the crystal, with the centroids of the central rings of the phenanthrene units in adjacent layers separated by a distance of 4.0287â
(10)â
Å. These centroids are shifted by 2.266â
(6)â
Å relative to each other, indicating slippage in the stacking arrangement. Furthermore, the distance between the centroids of the terminal and central rings of the phenanthrene units in adjacent layers is slightly shorter at 3.7533â
(19)â
Å. While all of the mol-ecules within each layer are oriented in the same direction, those in adjacent layers are oriented in the opposite direction, leading to anti-parallel stacks.
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01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Acta Crystallogr E Crystallogr Commun
Año:
2017
Tipo del documento:
Article
País de afiliación:
Estados Unidos
Pais de publicación:
Reino Unido