Osmium (IV) bromide
| Crystal structure | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
-bromid.png)
|
||||||||||
| Os 4+ : __ / Br - : __ | ||||||||||
| Crystal system |
orthorhombic |
|||||||||
| Space group |
Pbca (No. 61) |
|||||||||
| Lattice parameters |
a = 6.3399 Å , b = 12.1092 Å, c = 14.615 Å |
|||||||||
| General | ||||||||||
| Surname | Osmium (IV) bromide | |||||||||
| other names |
Osmium tetrabromide |
|||||||||
| Ratio formula | OsBr 4 | |||||||||
| Brief description |
black solid |
|||||||||
| External identifiers / databases | ||||||||||
|
||||||||||
| properties | ||||||||||
| Molar mass | 509.85 g mol −1 | |||||||||
| Physical state |
firmly |
|||||||||
| Melting point |
350 ° C (decomposition) |
|||||||||
| safety instructions | ||||||||||
|
||||||||||
| As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . | ||||||||||
Osmium (IV) bromide is a chemical compound of osmium from the group of bromides .
Extraction and presentation
Osmium (IV) bromide can be obtained by reacting osmium with bromine under pressure at an elevated temperature.
It can also be obtained by reacting osmium (IV) chloride with bromine at 330 ° C and high pressure or by refluxing osmium (VIII) oxide with ethanolic hydrogen bromide .
properties
Osmium (IV) bromide is a black solid. The compound decomposes in air at 350 ° C in osmium oxide bromide Os 2 OBr 6 .
use
Osmium (III) bromide can be obtained by thermal decomposition at 300–400 ° C in a closed environment .
Individual evidence
- ^ A b c d e Arnold Frederik Holleman, Egon Wiberg, Nils Wiberg: Textbook of Inorganic Chemistry . 101., verb. and strong exp. Edition. de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 1972 ( limited preview in Google Book Search).
- ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
- ^ Simon Cotton: Chemistry of Precious Metals . Springer Science & Business Media, 1997, ISBN 0-7514-0413-6 , pp. 5 ( limited preview in Google Book search).
- ^ NN Greenwood, A. Earnshaw: Chemistry of the Elements . Elsevier, 2012, ISBN 978-0-08-050109-3 , pp. 1083 ( limited preview in Google Book search).
- ^ Simon Cotton: Chemistry of Precious Metals . Springer Science & Business Media, 1997, ISBN 0-7514-0413-6 , pp. 4 ( limited preview in Google Book search).