Potassium hexachlororhenate

Potassium hexachlororhenate
Names
	Other names Potassium chlororhenite; Potassium hexachlororhenate(IV);
Identifiers
CAS Number	16940-97-9 ;
3D model (JSmol)	Interactive image;
ChemSpider	9114955;
ECHA InfoCard	100.037.265
EC Number	241-008-6;
PubChem CID	10939720;
	InChI InChI=1S/6ClH.2K.Re/h61H;;;/q;;;;;;2+1;+4/p-6 Key: HGCRXIXEXSEJGV-UHFFFAOYSA-H;
	SMILES Cl[Re-2](Cl)(Cl)(Cl)(Cl)Cl.[K+].[K+];
Properties
Chemical formula	K2ReCl6
Molar mass	477.12 g/mol
Appearance	Light green solid
Density	3.31 g/cm3
Solubility in water	Soluble, slowly hydrolyses
Solubility	Soluble in hydrochloric acid
Structure
Crystal structure	cubic
Space group	Fm3m
Lattice constant	a = 9.84 Å α = 90°, β = 90°, γ = 90°
Lattice volume (V)	953 Å3
Thermochemistry
Heat capacity (C)	214.8 J/(K·mol)
Std molar; entropy (S⦵298)	372.0 J/(K·mol)
Hazards
	GHS labelling:
Pictograms
Signal word	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). Infobox references

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.

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]

References

[1]

[2]

[3]

[4]

[5]

[6]

[7]

Names

Other names Potassium chlororhenite Potassium hexachlororhenate(IV)
Identifiers
CAS Number	16940-97-9^Y
3D model (JSmol)	Interactive image
ChemSpider	9114955
ECHA InfoCard	100.037.265
EC Number	241-008-6
PubChem CID	10939720
InChI InChI=1S/6ClH.2K.Re/h61H;;;/q;;;;;;2+1;+4/p-6 Key: HGCRXIXEXSEJGV-UHFFFAOYSA-H
SMILES Cl[Re-2](Cl)(Cl)(Cl)(Cl)Cl.[K+].[K+]
Properties
Chemical formula	K₂ReCl₆
Molar mass	477.12 g/mol
Appearance	Light green solid
Density	3.31 g/cm³
Solubility in water	Soluble, slowly hydrolyses^[1]
Solubility	Soluble in hydrochloric acid
Structure^[2]
Crystal structure	cubic
Space group	Fm3m
Lattice constant	a = 9.84 Å α = 90°, β = 90°, γ = 90°
Lattice volume (V)	953 Å³
Thermochemistry
Heat capacity (C)	214.8 J/(K·mol)^[3]
Std molar entropy (S^⦵₂₉₈)	372.0 J/(K·mol)^[3]
Hazards
GHS labelling:
Pictograms
Signal word	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). Infobox references