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Potassium hexachlororhenate

Chemical compound From Wikipedia, the free encyclopedia

Potassium hexachlororhenate, also known as potassium chlororhenite, is an inorganic chemical compound with the formula K2ReCl6. It is a light-green crystalline solid soluble in hydrochloric acid.

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Potassium hexachlororhenate
Names
Other names
  • Potassium chlororhenite
  • Potassium hexachlororhenate(IV)
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.037.265 Edit this at Wikidata
EC Number
  • 241-008-6
  • InChI=1S/6ClH.2K.Re/h6*1H;;;/q;;;;;;2*+1;+4/p-6
    Key: HGCRXIXEXSEJGV-UHFFFAOYSA-H
  • Cl[Re-2](Cl)(Cl)(Cl)(Cl)Cl.[K+].[K+]
Properties
K2ReCl6
Molar mass 477.12 g/mol
Appearance Light green solid
Density 3.31 g/cm3
Soluble, slowly hydrolyses[1]
Solubility Soluble in hydrochloric acid
Structure[2]
cubic
Fm3m
a = 9.84 Å
α = 90°, β = 90°, γ = 90°
953 Å3
Thermochemistry
214.8 J/(K·mol)[3]
372.0 J/(K·mol)[3]
Hazards
GHS labelling:
GHS05: Corrosive
Danger
Safety data sheet (SDS) Sigma-Aldrich
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Production and reactions

Potassium hexachlororhenate is most commonly prepared by the reduction of potassium perrhenate with potassium iodide, hypophosphorous acid, or chromium(II) chloride in the presence of hydrochloric acid.[4][5][6]

It reacts with silver nitrate to produce silver hexachlororhenate, which in turn decomposes at 400 °C to rhenium(III) chloride.[7]

In water, it hydrolyses to form rhenium(IV) oxide.[1]

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