Chemistry:Xenon oxytetrafluoride

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Xenon oxytetrafluoride
Ball-and-stick model of xenon oxytetrafluoride
Space-filling model of xenon oxytetrafluoride
Identifiers
3D model (JSmol)
ChemSpider
Properties
XeOF4
Molar mass 223.23 g/mol
Appearance colorless liquid
Density 3.17 g/cm3, liquid
Melting point −46.2 °C (−51.2 °F; 227.0 K)
Reacts with water
Structure
square pyramidal[1][2]
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

Xenon oxytetrafluoride (XeOF4) is an inorganic chemical compound. It is an unstable colorless liquid[2][3] with a melting point of −46.2 °C (−51.2 °F; 227.0 K)[4] that can be synthesized by partial hydrolysis of XeF6, or the reaction of XeF6 with silica[3] or NaNO3:[5]

NaNO3 + XeF6NaF + XeOF4 + FNO2

A high-yield synthesis proceeds by the reaction of XeF6 with POF3 at −196 °C (−320.8 °F; 77.1 K).[6]

Like most xenon oxides, it is extremely reactive, and it hydrolyses in water to give hazardous and corrosive products, including hydrogen fluoride:

2 XeOF4 + 4 H2O → 2 Xe + 8 HF + 3 O2

In addition, some ozone and fluorine is formed.

Reactions

XeOF4 reacts with H2O in the following steps:

XeOF4 + H2OXeO2F2 + 2 HF
XeO2F2 + H2OXeO3 + 2 HF

The XeO3 formed is a dangerous explosive, decomposing explosively to Xe and O2:

2 XeO3 → 2 Xe + 3 O2

In its liquid form, XeOF4 exhibits amphoteric behaviour, forming complexes with both strong Lewis bases like CsF and strong Lewis acids like SbF5.[7] It forms a 1:1 adduct with XeF2, isostructural with XeF2·IF5,[8] as well as various heavy alkali metal fluorides.[4]

The reaction of XeOF4 with XeO3 provides a convenient synthesis route for XeO2F2.[9]

External links

  • Xenon tetrafluoride oxide in Linstrom, Peter J.; Mallard, William G. (eds.); NIST Chemistry WebBook, NIST Standard Reference Database Number 69, National Institute of Standards and Technology, Gaithersburg (MD), http://webbook.nist.gov (retrieved 2022-04-13)

References

  1. Martins, Joseph; Wilson, E. Bright Jr. (1964). "Microwave Spectrum of Xenon Oxytetrafluoride" (in en). The Journal of Chemical Physics 41 (570): 570–571. doi:10.1063/1.1725910. ISSN 0021-9606. Bibcode1964JChPh..41..570M. 
  2. 2.0 2.1 Smith, D. F. (1963-05-24). "Xenon Oxyfluoride" (in en). Science 140 (3569): 899–900. doi:10.1126/science.140.3569.899. ISSN 0036-8075. OCLC 1644869. PMID 17810680. Bibcode1963Sci...140..899S. 
  3. 3.0 3.1 Ibers, James A. (October 1965). "Molecular Structure". Annual Review of Physical Chemistry 16: 375–396. doi:10.1146/annurev.pc.16.100165.002111. ISSN 0066-426X. OCLC 1373069. Bibcode1965ARPC...16..375I. 
  4. 4.0 4.1 Selig, Henry (1966-02-01). "Complexes of Xenon Oxide Tetrafluoride" (in en). Inorganic Chemistry 5 (2): 183–186. doi:10.1021/ic50036a004. ISSN 0020-1669. 
  5. Christe, Karl O.; Wilson, William W. (April 1988). "Convenient synthesis of xenon oxide tetrafluoride" (in en). Inorganic Chemistry 27 (7): 1296–1297. doi:10.1021/ic00280a043. ISSN 0020-1669. 
  6. Nielsen, Jon B.; Kinkead, Scott A.; Eller, P. Gary (1990-09-01). "A New Synthesis of Xenon Oxytetrafluoride, XeOF4" (in en). Inorganic Chemistry 29 (18): 3621–3622. doi:10.1021/ic00343a063. ISSN 0020-1669. 
  7. Martin-Rovet, D.; Angelié, C.; Cauchetier, M.; Schrobilgen, G. J. (September 1982). "Various aspects of the reactivity of the xenon(VI) oxyfluoride: XeOF4" (in en). Journal of Fluorine Chemistry 21 (1): 10. doi:10.1016/S0022-1139(00)85330-0. ISSN 0022-1139. 
  8. Bartlett, N.; Wechsberg, M. (October 1971). "The Xenon Difluoride Complexes XeF2 · XeOF4; XeF2 · XeF6 · AsF5 and XeF2 · 2 XeF6 · 2 AsF5 and Their Relevance to Bond Polarity and Fluoride Ion Donor Ability of XeF2 and XeF6" (in en). Zeitschrift für anorganische und allgemeine Chemie 385 (1). doi:10.1002/zaac.19713850103. ISSN 0044-2313. OCLC 1770423. 
  9. Huston, John L. (September 1967). "Xenon dioxide difluoride: isolation and some properties" (in en). The Journal of Physical Chemistry A 71 (10): 3339–3341. doi:10.1021/j100869a035. ISSN 1089-5639.