Potassium hexabromorhenate
| Names | |
|---|---|
| IUPAC name
dipotassium; hexabromo rhenium(2-)
| |
| Other names
Potassium hexabromorhenate(IV)
| |
| Identifiers | |
3D model (JSmol)
|
|
| ChemSpider | |
PubChem CID
|
|
| |
| |
| Properties | |
| Br6K2Re | |
| Molar mass | 743.828 g·mol−1 |
| Appearance | dark red crystals |
| Density | 4.34 g/cm3 |
| reacts with water | |
| Hazards | |
| GHS labelling: | |
| Warning | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
Potassium hexabromorhenate is an inorganic chemical compound with the chemical formula K2ReBr6.[1][2]
Synthesis
[edit]Fusion of rhenium with potassium bromide in a bromine vapor current:
- Re + 2KBr + 2Br2 → K2ReBr6
The effect of hydrobromic acid on a mixture of potassium bromide with rhenium(VI) oxide:[3]
- ReO2 + 2KBr + 4HBr → K2ReBr6 + 2H2O
Reduction of potassium perrenate by potassium iodide in concentrated hydrobromic acid:[3]
- 2KReO4 + 6KI + 16HBr → 2K2ReBr6 + 4KBr + 3I2 + 8H2O
Chemical properties
[edit]Potassium hexabromorhenate dissolves in hydrobromic acid to create a red or deep yellow solution.[4]
Reacts with water.
- K2ReBr6 + 2H2O → ReO2 + 2KBr + 4HBr
Physical properties
[edit]The compound forms dark red crystals of cubic system, space group Fm3m.[5]
References
[edit]- ^ Meloche, Villiers W.; Martin, Ronald (November 1956). "Synthesis of Potassium Hexachlororhenate and Potassium Hexabromorhenate". Journal of the American Chemical Society. 78 (22): 5955–5956. doi:10.1021/ja01603a067. ISSN 0002-7863. Retrieved 25 August 2024.
- ^ "Potassium Hexabromorhenate". American Elements. Retrieved 25 August 2024.
- ^ a b Watt, George W.; Thompson, Richard J.; Gibbons, Jean M. (1963). "Potassium Hexachlororhenate(IV) and Potassium Hexabromorhenate(IV)". Inorganic Syntheses. VII: 189–192. doi:10.1002/9780470132388.ch51. ISBN 978-0-470-13166-4. Retrieved 26 August 2024.
- ^ Kemmitt, R. D. W.; Peacock, R. D. (26 January 2016). The Chemistry of Manganese, Technetium and Rhenium: Pergamon Texts in Inorganic Chemistry. Elsevier. p. 974. ISBN 978-1-4831-8762-4. Retrieved 25 August 2024.
- ^ Donnay, Joseph Désiré Hubert (1973). Crystal Data: Inorganic compounds. National Bureau of Standards. p. 285. Retrieved 25 August 2024.