2,2′-Dibromo-3,3′,4,4′,5,5′,6,6′-octamethyl-1,1′-biphenyl
✍ Scribed by Karunadasa, Hemamala ;Leggett, Christina ;Wong, Shaun
- Publisher
- International Union of Crystallography
- Year
- 2004
- Tongue
- English
- Weight
- 190 KB
- Volume
- 60
- Category
- Article
- ISSN
- 1600-5368
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✦ Synopsis
The title compound, C 29 H 24 Br 2 , has crystallographic twofold rotation symmetry. The Br atom in the 2 position is disordered with the methyl group in the 6 position. The biphenyl bridge bond distance and the torsion angle between the rings are in good agreement with similar previously reported structures.
📜 SIMILAR VOLUMES
Single-crystal X-ray study T = 178 K Mean '(C±C) = 0.003 A Ê R factor = 0.042 wR factor = 0.115 Data-to-parameter ratio = 24.9 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.
The title molecule, C 52 H 58 N 2 P 2 , has a non-crystallographic twofold axis. The bond lengths and angles are within expected ranges.
The title compound, C 12 H 4 Br 6 O, belongs to a group of ¯ame retardants known as polybrominated diphenyl ethers (PBDE). Intermolecular BrÁ Á ÁBr contacts in the bc plane give a sheetlike character to the structure of the title compound.