Xenic acid

Xenic acid is a proposed noble gas compound with the chemical formula H₂XeO₄ or XeO₂(OH)₂. It has not been isolated, and the published characterization data are ambiguous.^[2]

Xenic acid

Structural formula Ball-and-stick model of xenic acid
Identifiers
CAS Number	1402134-83-1 N
3D model (JSmol)	Interactive image
ChemSpider	10466143 Y
PubChem CID	23422578
CompTox Dashboard (EPA)	DTXSID701027094
InChI InChI=1S/H2O4Xe/c1-5(2,3)4/h1-2H N Key: HRLLZBGOCZURJC-UHFFFAOYSA-N N InChI=1/H2O4Xe/c1-5(2,3)4/h1-2H Key: HRLLZBGOCZURJC-UHFFFAOYAW
SMILES O[Xe](O)(=O)=O
Properties
Chemical formula	H2XeO4
Molar mass	197.31 g/mol
Acidity (pKa)	≈10[1]
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

Salts of xenic acid are called xenates, containing the HXeO⁻
₄ anion, such as monosodium xenate. They tend to disproportionate into xenon gas and perxenates:^[3]

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 deprotonated anion XeO²⁻
₄ are presently unknown.^[3]