Xenon tetroxide

Xenon tetroxide is a chemical compound of xenon and oxygen with molecular formula XeO4, remarkable for being a relatively stable compound of a noble gas. It is a yellow crystalline solid that is stable below −35.9 °C; above that temperature it is very prone to exploding and decomposing into elemental xenon and oxygen (O2).

Xenon tetroxide
Names
IUPAC names
Xenon tetraoxide
Xenon(VIII) oxide
Other names
Xenon tetroxide
Perxenic anhydride
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/O4Xe/c1-5(2,3)4 Y
    Key: VHWKDFQUJRCZDZ-UHFFFAOYSA-N Y
  • InChI=1/O4Xe/c1-5(2,3)4
    Key: VHWKDFQUJRCZDZ-UHFFFAOYAS
  • [O-] [Xe+4]([O-])([O-])[O-]
Properties
XeO4
Molar mass 195.29 g mol−1
Appearance Yellow solid below −36 °C
Melting point −35.9 °C (−32.6 °F; 237.2 K)
Boiling point 0 °C (32 °F; 273 K)
reacts
Structure
Tetrahedral
0 D
Thermochemistry
+153.5 kcal mol−1
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 powerful explosive
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).
N verify (what is YN ?)
Infobox references

All eight valence electrons of xenon are involved in the bonds with the oxygen, and the oxidation state of the xenon atom is +8. Oxygen is the only element that can bring xenon up to its highest oxidation state; even fluorine can only give XeF6 (+6).

Two other short-lived xenon compounds with an oxidation state of +8, XeO3F2 and XeO2F4, are accessible by the reaction of xenon tetroxide with xenon hexafluoride. XeO3F2 and XeO2F4 can be detected with mass spectrometry. The perxenates are also compounds where xenon has the +8 oxidation state.

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