Redetermination of 4,4′-dibromobiphenyl
✍ Scribed by Mohamed, Ajax K. ;Auner, Norbert ;Bolte, Michael
- Publisher
- International Union of Crystallography
- Year
- 2003
- Tongue
- English
- Weight
- 164 KB
- Volume
- 59
- Category
- Article
- ISSN
- 1600-5368
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
The title compound, C 12 H 7 Br 3 O, belongs to a group of ¯ame retardants known as polybrominated diphenyl ethers (PBDE). Salient features of the packing of the title compound are in®nite intermolecular BrÁ Á ÁBr contact chains along the b direction.
The title compound, C 12 H 6 Br 4 O, is the fourth well characterized of a total of potentially 209 different brominated diphenyl ethers. Salient intermolecular interactions are between ether O and aromatic C atoms, and between a bromine substituent and the aromatic ring system.
H -Dicyanobiphenyl, C 14 H 8 N 2 , has a normal structure with a twist angle of 31.8 (2) . The molecules stack with overlapping % systems and form chains held together by antiparallel CÐ NÁ Á ÁCÐN interactions. In addition, there are a number of CÐ HÁ Á ÁN interactions.
H -Diiodobiphenyl, C 12 H 8 I 2 , crystallizes as a homologous isomorph of the high-temperature form of p-diiodobenzene. The molecule is planar and lies on a center of symmetry. Each I atom is in contact with ®ve others at distances between 4.0 and 4.5 A Ê .