Xenon octafluoride

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Xenon octafluoride
Approximate geometry predicted computationally
Names
IUPAC name
Octafluoroxenon
Other names
Xenon(VIII) fluoride
Identifiers
3D model (JSmol)
  • InChI=1S/F8Xe/c1-9(2,3,4,5,6,7)8
    Key: CDIGVRPYRMDMBF-UHFFFAOYSA-N
  • F[Xe](F)(F)(F)(F)(F)(F)F
Properties
F8Xe
Molar mass 283.280 g·mol−1
Related compounds
Related compounds
 Osmium octafluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Xenon octafluoride is a chemical compound of xenon and fluorine with the chemical formula XeF8.[1] This is still a hypothetical compound.[2][3] XeF8 is predicted to be unstable even under pressures reaching 200 GPa.[4]

History

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The compound was initially predicted in 1933 by Linus Pauling—among other noble gas compounds but which, unlike other xenon fluorides, could probably never be synthesized.[5][6] This appears to be due to the steric hindrance of the fluorine atoms around the xenon atom. However, scientists continue to try to synthesize it.[7]

Potential synthesis

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The formation of xenon octafluoride has been calculated to be endothermic:[8]

Xe + 4 F2 → XeF8

Ion

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The doubly charged anion octafluoroxenate XeF2−
8 in which the oxidation number of xenon is only VI, is stable in salts.

References

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  1. ^ Soni, P. L.; Soni, Vandna (6 June 2025). Inorganic Chemistry: Concepts and Main Group of Elements. CRC Press. p. 415. ISBN 978-1-040-35102-4. Retrieved 12 March 2025.
  2. ^ Frlec, Boris; Holloway, John H.; Slivnik, Jože; Šmalc, Andrej; Volavšek, Bogdan; Zemljič, Anton (1 August 1970). "An examination of the possibility of the existence of xenon octafluoride". Journal of Inorganic and Nuclear Chemistry. 32 (8): 2521–2527. doi:10.1016/0022-1902(70)80296-2. ISSN 0022-1902. Retrieved 31 March 2023.
  3. ^ Housecroft, Catherine E.; Sharpe, A. G. (2008). Index. Pearson Prentice Hall. p. 1097. ISBN 978-0-13-175553-6. Retrieved 31 March 2023.
  4. ^ Peng, Feng; Botana, Jorge; Wang, Yanchao; Ma, Yanming; Miao, Maosheng (2016-11-17). "Unexpected Trend in Stability of Xe–F Compounds under Pressure Driven by Xe–Xe Covalent Bonds". The Journal of Physical Chemistry Letters. 7 (22): 4562–4567. doi:10.1021/acs.jpclett.6b01922. ISSN 1948-7185.
  5. ^ Weinstock, Bernard; Weaver, E. Eugene; Knop, Charles P. (December 1, 1966). "The Xenon-Fluorine System". Inorg. Chem. 66 (5): 2189. doi:10.1021/ic50046a026. Retrieved 31 March 2023.
  6. ^ Pauling, Linus (May 1933). "The Formulas of Antimonic Acid and the Antimonates". Journal of the American Chemical Society. 55 (5): 1895–1900. Bibcode:1933JAChS..55.1895P. doi:10.1021/ja01332a016. ISSN 0002-7863. Retrieved 31 March 2023.
  7. ^ Cotton, F. Albert (17 September 2009). Progress in Inorganic Chemistry, Volume 6. John Wiley & Sons. p. 249. ISBN 978-0-470-16657-4. Retrieved 31 March 2023.
  8. ^ Holleman, A. F.; Wiberg, Egon; Wiberg, Nils (2001). Inorganic Chemistry. Academic Press. p. 394. ISBN 978-0-12-352651-9. Retrieved 31 March 2023.