Potassium hexaiodorhenate

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Potassium hexaiodorhenate
Names
IUPAC name
dipotassium; hexaiodo rhenium(2-)
Other names
Potassium hexaiodorhenate(IV), dipotassium hexaiodorhenate
Identifiers
3D model (JSmol)
ChemSpider
EC Number
  • 621-412-2
PubChem CID
  • InChI=1S/6HI.2K.Re/h6*1H;;;/q;;;;;;2*+1;+4/p-6
    Key: DFWHBRZEYYLAED-UHFFFAOYSA-H
  • [K+].[K+].I[Re--](I)(I)(I)(I)I
Properties
I6K2Re
Molar mass 1025.830 g·mol−1
Appearanceblack crystals
Density g/cm3
reacts with water
Hazards
GHS labelling: [1]
GHS-pictogram-acid.svg
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]

Contents

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

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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.
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