Rhenium(III) iodide

Rhenium(III) iodide
Names
Other names
Rhenium(III) iodide, triiodorhenium
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.036.074 Edit this at Wikidata
EC Number
  • 239-698-9
  • InChI=1S/3HI.Re/h3*1H;/q;;;+3/p-3
    Key: DDMQJDMHHOTHKW-UHFFFAOYSA-K
  • I[Re](I)I
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).

Rhenium(III) iodide is a binary chemical compound of rhenium and iodide with the chemical formula ReI
3.[1][2]

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

Rhenium(III) iodide forms violet-black crystals. It is poorly soluble in water, acetone, ethanol, ether, and dilute acid solutions.

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

References

  1. ^ "Rhenium(III) Iodide". American Elements. Retrieved 6 May 2023.
  2. ^ "Rhenium(III) iodide". Alfa Chemistry. Retrieved 6 May 2023.
  3. ^ Kemmitt, R. D. W.; Peacock, R. D. (26 January 2016). The Chemistry of Manganese, Technetium and Rhenium: Pergamon Texts in Inorganic Chemistry. Elsevier. p. 918. ISBN 978-1-4831-8762-4. Retrieved 6 May 2023.
  4. ^ Inorganic Syntheses, Volume 7. John Wiley & Sons. 22 September 2009. p. 185. ISBN 978-0-470-13270-8. Retrieved 6 May 2023.