Rhenium(III) iodide
Chemical compound
From Wikipedia, the free encyclopedia
Rhenium(III) iodide is a binary chemical compound of rhenium and iodide with the chemical formula ReI
3.[1][2]
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| Names | |
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| Other names
Rhenium(III) iodide, triiodorhenium | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.036.074 |
| EC Number |
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PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| I3Re | |
| Molar mass | 566.920 g·mol−1 |
| Appearance | violet-black crystals |
| Density | 6.37 g/cm3 |
| Melting point | 800 °C (1,470 °F; 1,070 K) |
| poorly soluble | |
| Structure | |
| monoclinic | |
| Related compounds | |
Related compounds |
Iridium triiodide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Synthesis
Rhenium(III) iodide can be synthesized by the decomposition of rhenium(IV) iodide:[3][4]
- 2ReI4 → 2ReI3 + I2
Another way to make it is by introduction of ethanol into a mixture of perrhenic acid and hydroiodic acid.
- HReO4 + 3HI + 2C2H5OH → ReI3 + 4H2O + 2CH3CHO
Physical properties
Chemical properties
When heated in vacuum up to 170 °C, the compound decomposes to rhenium(II) iodide, and at 380 °C — to rhenium(I) iodide:
- 2ReI3 → 2ReI2 + I2
- ReI3 → ReI + I2