Potassium hexafluoroarsenate

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Potassium hexafluoroarsenate
Potassium hexafluoroarsenate(V).png
Names
IUPAC name
potassium hexafluoro-λ⁵-arsanuide
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.037.351 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 241-102-7
KEGG
PubChem CID
UNII
  • InChI=1S/AsF6.K/c2-1(3,4,5,6)7;/q-1;+1
    Key: DITNVAZRXJOPSJ-UHFFFAOYSA-N
  • F[As-](F)(F)(F)(F)F.[K+]
Properties
AsF6K
Molar mass 228.0103 g·mol−1
Appearancewhite powder
Melting point 400 °C (752 °F; 673 K)
Hazards
GHS labelling: [1]
GHS-pictogram-skull.svg GHS-pictogram-pollu.svg
Danger
H301, H331, H410
P261, P264, P270, P271, P273, P301+P316, P304+P340, P316, P321, P330, P391, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Potassium hexafluoroarsenate is an inorganic chemical compound with the chemical formula KAsF6. [2] [3]

Contents

Synthesis

Potassium hexafluoroarsenate can be prepared by direct action of arsenic pentafluoride and potassium fluoride:

AsF5 + KF → KAsF6

Also, it can be synthesized by the action of hydrofluoric acid on arsenic pentafluoride in the presence of potassium perbromate: [4]

KBrO4 + 3HF + 2AsF5 + KF → KAsF6 + AsF6[H3O]

Also, potassium hexafluoroarsenate is synthesized by treating arsenic pentachloride and potassium chloride in the presence of hydrofluoric acid:

AsCl5 + KCl + 6HF → KAsF6 + 6HCl

Physical characteristics

Potassium hexafluoroarsenate is a white powder with a pungent odor. The compound is stable under normal conditions. The melting point is around 400 °C. The substance is not flammable. It is incompatible with strong oxidizing agents. [5]

Safety

Potassium hexafluoroarsenate is toxic when swallowed or inhaled and is hazardous to the environment. The compound is considered carcinogenic. Hazards in the event of fire include hydrogen fluoride, potassium oxide and arsenic oxides. [6]

Related Research Articles

<span class="mw-page-title-main">Bromine pentafluoride</span> Chemical compound

Bromine pentafluoride, BrF5, is an interhalogen compound and a fluoride of bromine. It is a strong fluorinating agent.

Iodine pentafluoride is an interhalogen compound with chemical formula IF5. It is one of the fluorides of iodine. It is a colorless liquid, although impure samples appear yellow. It is used as a fluorination reagent and even a solvent in specialized syntheses.

Antimony pentafluoride is the inorganic compound with the formula SbF5. This colourless, viscous liquid is a strong Lewis acid and a component of the superacid fluoroantimonic acid, formed upon mixing liquid HF with liquid SbF5 in 1:1 ratio. It is notable for its strong Lewis acidity and the ability to react with almost all known compounds.

<span class="mw-page-title-main">Hydrogen fluoride</span> Chemical compound

Hydrogen fluoride (fluorane) is an inorganic compound with chemical formula HF. It is a very poisonous, colorless gas or liquid that dissolves in water to yield an aqueous solution termed hydrofluoric acid. It is the principal industrial source of fluorine, often in the form of hydrofluoric acid, and is an important feedstock in the preparation of many important compounds including pharmaceuticals and polymers, e.g. polytetrafluoroethylene (PTFE). HF is also widely used in the petrochemical industry as a component of superacids. Due to strong and extensive hydrogen bonding, it boils at near room temperature, much higher than other hydrogen halides.

<span class="mw-page-title-main">Manganese(IV) fluoride</span> Chemical compound

Manganese tetrafluoride, MnF4, is the highest fluoride of manganese. It is a powerful oxidizing agent and is used as a means of purifying elemental fluorine.

Arsenic trifluoride is a chemical compound of arsenic and fluorine with the chemical formula AsF3. It is a colorless liquid which reacts readily with water.

Arsenic pentafluoride is a chemical compound of arsenic and fluorine. It is a toxic, colorless gas. The oxidation state of arsenic is +5.

Dinitrogen difluoride is a chemical compound with the formula N2F2. It is a gas at room temperature, and was first identified in 1952 as the thermal decomposition product of the fluorine azide. It has the structure F−N=N−F and exists in both cis and trans isomers, as typical for diimides.

<span class="mw-page-title-main">Bismuth pentafluoride</span> Chemical compound

Bismuth pentafluoride is an inorganic compound with the formula BiF5. It is a white solid that is highly reactive. The compound is of interest to researchers but not of particular value.

Chromium hexafluoride or chromium(VI) fluoride (CrF6) is a hypothetical chemical compound between chromium and fluorine with the chemical formula CrF6. It was previously thought to be an unstable yellow solid decomposing at −100 °C, but this has been shown to be a misidentification of chromium pentafluoride, CrF5.

<span class="mw-page-title-main">Vanadium pentafluoride</span> Chemical compound

Vanadium(V) fluoride is the inorganic compound with the chemical formula VF5. It is a colorless volatile liquid that freezes near room temperature. It is a highly reactive compound, as indicated by its ability to fluorinate organic substances.

Chromium pentafluoride is the inorganic compound with the chemical formula CrF5. It is a red volatile solid that melts at 34 °C. It is the highest known chromium fluoride, since the hypothetical chromium hexafluoride has not yet been synthesized.

<span class="mw-page-title-main">Hexafluoroarsenate</span> Chemical compound

The hexafluoroarsenate anion is a chemical species with formula AsF−6. Hexafluoroarsenate is relatively inert, being the conjugate base of the notional superacid hexafluoroarsenic acid.

<span class="mw-page-title-main">Pertechnetyl fluoride</span> Chemical compound

Pertechnetyl fluoride is an inorganic compound, a salt of technetium and hydrofluoric acid with the chemical formula TcO
3F. The compound was originally synthesized by H. Selig and G. Malm in 1963.

Rhenium pentafluoride is a binary inorganic compound of rhenium and fluorine with the chemical formula ReF5. This is a salt of rhenium and hydrofluoric acid.

Perbromyl fluoride is an inorganic compound of bromine, fluorine, and oxygen with the chemical formula BrO3F.

Nickel tetrafluoride is a binary inorganic compound of nickel and fluorine with a chemical formula of NiF4.

Potassium hexafluorotitanate is an inorganic compound of potassium, fluorine, and titanium with the chemical formula K2TiF6.

<span class="mw-page-title-main">Potassium hexafluoroantimonate</span> Chemical compound

Potassium hexafluoroantimonate is an inorganic chemical compound with the chemical formula KSbF6.

References

  1. ↑ "Potassium hexafluoroarsenate". pubchem.ncbi.nlm.nih.gov.
  2. ↑ "Potassium hexafluoroarsenate(V), 99% (metals basis), Thermo Scientific | Fisher Scientific". Fisher Scientific . Retrieved 15 June 2024.
  3. ↑ "potassium hexafluoroarsenate". NIST . Retrieved 15 June 2024.
  4. ↑ Hagen, A. P. (17 September 2009). Inorganic Reactions and Methods, The Formation of Bonds to Halogens (Part 1). John Wiley & Sons. p. 46. ISBN   978-0-470-14538-8 . Retrieved 15 June 2024.
  5. ↑ "GESTIS-Stoffdatenbank". gestis.dguv.de. Retrieved 15 June 2024.
  6. ↑ "Potassium hexafluoroarsenate(V)". Sigma Aldrich . Retrieved 15 June 2024.
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