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Potassium hexabromorhenate is an inorganic chemical compound with the chemical formula K₂ReBr₆.

Synthesis

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:

ReO₂ + 2KBr + 4HBr → K₂ReBr₆ + 2H₂O

Reduction of potassium perrenate by potassium iodide in concentrated hydrobromic acid:

2KReO₄ + 6KI + 16HBr → 2K₂ReBr₆ + 4KBr + 3I₂ + 8H₂O

Chemical properties

Potassium hexabromorhenate dissolves in hydrobromic acid to create a red or deep yellow solution.

Reacts with water.

K₂ReBr₆ + 2H₂O → ReO₂ + 2KBr + 4HBr

Physical properties

The compound forms dark red crystals of cubic system, space group Fm3m.

References

1. 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.
2. "Potassium Hexabromorhenate". American Elements. Retrieved 25 August 2024.
3. ^ 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.
4. 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.
5. Donnay, Joseph Désiré Hubert (1973). Crystal Data: Inorganic compounds. National Bureau of Standards. p. 285. Retrieved 25 August 2024.

• Potassium compounds
• Rhenium compounds
• Bromo complexes
• Bromometallates