Vanadium (IV) bromide
General | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Surname | Vanadium (IV) bromide | |||||||||
other names |
|
|||||||||
Molecular formula | VBr 4 | |||||||||
Brief description |
purple, crystalline solid (below −23 ° C) |
|||||||||
External identifiers / databases | ||||||||||
|
||||||||||
properties | ||||||||||
Molar mass | 370.558 g mol −1 | |||||||||
Physical state |
solid (below −23 ° C) |
|||||||||
Melting point | ||||||||||
safety instructions | ||||||||||
|
||||||||||
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Vanadium (IV) bromide is a chemical compound of the elements vanadium and bromine . It is a purple-red, crystalline solid that is only stable in the gas phase and below −23 ° C.
Extraction and presentation
Vanadium (IV) bromide can be obtained from the elements at over 300 ° C:
The gas is then brought to a cold surface of −78 ° C, since vanadium (IV) bromide is very decomposable at room temperature.
properties
At above −23 ° C vanadium (IV) bromide breaks down into vanadium (III) bromide and bromine :
Individual evidence
- ↑ webelements.com: Vanadium: vanadium tetrabromide , accessed on January 14, 2018.
- ↑ a b c d e A. F. Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , pp. 1545-1548.
- ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.