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Potassium hexachlororhenate

From Wikipedia, the free encyclopedia
Potassium hexachlororhenate
Names
Other names
  • Potassium chlororhenite
  • Potassium hexachlororhenate(IV)
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard100.037.265Edit 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 mass477.12 g/mol
AppearanceLight green solid
Density3.31 g/cm3
Soluble, slowly hydrolyses[1]
SolubilitySoluble inhydrochloric 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 theirstandard state (at 25 °C [77 °F], 100 kPa).
Chemical compound

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

Production and reactions

[edit]

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

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

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

References

[edit]
  1. ^abM. Pavlova; N. Jordanov; N. Popova (1974). "The hydrolysis of potassium hexachlororhenate".Journal of Inorganic and Nuclear Chemistry.36 (12):3845–3847.doi:10.1016/0022-1902(74)80175-2.
  2. ^H. D. Grundy; I. D. Brown (1970)."A refinement of the crystal structures of K2ReCl6, K2ReBr6, and K2PtBr6".Canadian Journal of Chemistry.48 (7):1033–1045.doi:10.1139/v70-189.
  3. ^abR. H. Busey; H. H. Dearman; R. B. Bevan Jr. (1962). "THE HEAT CAPACITY OF POTASSIUM HEXACHLORORHENATE(IV) FROM 7 TO 320K. ANOMALIES NEAR 12, 76, 103, AND 111K. ENTROPY AND FREE ENERGY FUNCTIONS. SOLUBILITY AND HEAT OF SOLUTION OF K2ReCl6. ENTROPY OF THE HEXACHLORORHENATE ION1".The Journal of Physical Chemistry.66 (1):82–89.doi:10.1021/j100807a017.
  4. ^Loren C. Hurd; Victor A. Reinders; W. A. Taebel; B. S. Hopkins (1939). "Potassium Chlororhenite". In Booth, Harold (ed.).Inorganic Syntheses (1 ed.). The McGraw-Hill Book Company. pp. 178–180.doi:10.1002/9780470132326.ch61.ISBN 9780470131602. Retrieved12 November 2023.
  5. ^Villiers W. Meloche; Ronald Martin (1956). "Synthesis of Potassium Hexachlororhenate and Potassium Hexabromorhenate".Journal of the American Chemical Society.78 (22):5955–5956.doi:10.1021/ja01603a067.
  6. ^George W. Watt; Richard J. Thompson; Jean M. Gibbons (1963). "Potassium Hexachlororhenate(IV) and Potassium Hexabromorhenate(IV)". In Kleinberg, Jacob (ed.).Inorganic Syntheses (7th ed.). McGraw-Hill Book Company. pp. 189–192.doi:10.1002/9780470132388.ch51.ISBN 9780470131664. Retrieved12 November 2023.
  7. ^J. P. King; J. W. Cobble (1960). "The Thermodynamic Properties of Technetium and Rhenium Compounds. VII. Heats of Formation of Rhenium Trichloride and Rhenium Tribromide. Free Energies and Entropies".Journal of the American Chemical Society.82 (9):2111–2113.doi:10.1021/ja01494a005.
H, (pseudo)halogens
chalcogens
pnictogens
B, C group
transition metals
organic
Rhenium(0)
Organorhenium(0)
Rhenium(I)
Organorhenium(I)
Rhenium(II)
Rhenium(III)
Rhenium(IV)
Rhenium(V)
Rhenium(VI)
Rhenium(VII)
Perrhenates
Organorhenium(VII)
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