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Potassium hexaiodorhenate is an inorganic chemical compound with the chemical formula K2ReI6.[2][3]

Synthesis

The compound can be prepared by reduction of potassium perrhenate by potassium iodide in concentrated hydrochloric acid:[4]

2KReO4 + 2KI + 16HI → 2KReI6 + 3I2 + 8H2O

Physical properties

The compound forms black crystals, soluble in warm HI,[clarification needed] methanol, and acetone.[5]

Chemical properties

Potassium hexaiodorhenate is hydrolyzed in aqueous solutions.

K2ReI6 + 2H2O → ReO2 + 2KI + 4HI

It decomposes when heated:

K2ReI6 → Re + 2KI + 2I2

It reacts with strong acids:

K2ReI6 + H2SO4 → HReI5 + HI + K2SO4

References

  1. ^ “Dipotassium hexaiodorhenate”. pubchem.ncbi.nlm.nih.gov.
  2. ^ “Potassium hexaiodorhenate(IV)”. Sigma Aldrich. Retrieved 28 August 2024.
  3. ^ “Potassium Hexaiodorhenate(IV)”. American Elements. Retrieved 28 August 2024.
  4. ^ Inorganic Syntheses, Volume 27. John Wiley & Sons. 22 September 2009. p. 294. ISBN 978-0-470-13293-7. Retrieved 28 August 2024.
  5. ^ Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 3516. ISBN 978-0-412-30120-9. Retrieved 28 August 2024.