Potassium hexaiodorhenate
| Names | |
|---|---|
| IUPAC name dipotassium; hexaiodo rhenium(2-) | |
| Other names Potassium hexaiodorhenate(IV), dipotassium hexaiodorhenate | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
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PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| I6K2Re | |
| Molar mass | 1025.830 g·mol−1 |
| Appearance | black crystals |
| Density | g/cm3 |
| reacts with water | |
| Hazards | |
| GHS labelling:[1] | |
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| Danger | |
| H314 | |
| P260, P264, P280, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P316, P321, P363, P405, P501 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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
- ^ "Dipotassium hexaiodorhenate". pubchem.ncbi.nlm.nih.gov.
- ^ "Potassium hexaiodorhenate(IV)". Sigma Aldrich. Retrieved 28 August 2024.
- ^ "Potassium Hexaiodorhenate(IV)". American Elements. Retrieved 28 August 2024.
- ^ Inorganic Syntheses, Volume 27. John Wiley & Sons. 22 September 2009. p. 294. ISBN 978-0-470-13293-7. Retrieved 28 August 2024.
- ^ Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 3516. ISBN 978-0-412-30120-9. Retrieved 28 August 2024.
