Xenic acid

Xenic acid
Identifiers
3D model (JSmol)
ChemSpider
Properties
H2XeO4
Molar mass 197.31 g/mol
Related compounds
Related compounds
 Perxenic acid
Xenon trioxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Xenic acid is a noble gas compound formed by the dissolution of xenon trioxide in water. Its chemical formula is H2XeO4. It is a very powerful oxidizing agent, and its decomposition is dangerous as it liberates a large amount of gaseous products: xenon, oxygen, and ozone. However, this feature is also what makes xenic acid practically useful in syntheses: there is no chance of introducing impurities to the oxidation products, as all the byproducts can be trivially evaporated.

Its existence was hypothesized by Linus Pauling in 1933.[1] Xenic acid has been used as an oxidizing agent in organic chemistry.

Salts of xenic acid are called xenates, containing the HXeO−
4 anion. They tend to disproportionate into xenon gas and perxenates:[2]

2 HXeO−
4 + 2 OH−
 → XeO4−
6 + Xe + O
2 + 2 H
2O

The energy given off is sufficient to form ozone from diatomic oxygen:

3 O
2 (g) → 2 O
3 (g)

Salts containing the completely deprotonated anion XeO2−
4 are presently unknown.[2]

References

  1. ↑ Linus Pauling (June 1933). "The Formulas of Antimonic Acid and the Antimonates". J. Am. Chem. Soc. 55 (5): 1895–1900. doi:10.1021/ja01332a016.
  2. 1 2 Egon Wiberg; Nils Wiberg; Arnold Frederick Holleman (2001). Inorganic chemistry. Academic Press. p. 399. ISBN 0-12-352651-5.

Further reading

  • Bruno Jaselskis, Stanislaus Vas (May 1964). "Xenic Acid Reactions with vic-Diols". J. Am. Chem. Soc. 86 (10): 2078–2079. doi:10.1021/ja01064a041.
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