Xenon acid

Xenon acid
Xenon acid
Are common
Systematic ; name	Tetrahydroxy (dioxo) xenon
Chem. formula	H 4 XeO 6
Physical properties
Molar mass	231.32 g / mol
Classification
Reg. CAS number
Smiles

Xenon acid is a very unstable chemical compound with the formula H ₄ XeO ₆ . Very strong tetrabasic acid. Xenonic acid salts are called perxenates ; they, unlike the acid itself, are stable.

Getting

Xenon acid is obtained by dissolving xenon (VIII) oxide in water.

{\ce {{XeO4}+{2H2O}-> H4XeO6}}

{\ displaystyle {\ ce {{XeO4} + {2H2O} -> H4XeO6}}}

{\ce {{XeO4}+{2H2O}-> H4XeO6}}

Chemical Properties

Not isolated in its pure form, since in an acidic environment it quickly decomposes into xenon trioxide and oxygen ^[1] ^[2] :

{\ce {{2HXeO6^{3-}}+{6H+}->{2XeO3}+{4H2O}+{O2}\uparrow }}

{\ displaystyle {\ ce {{2HXeO6 ^ {3 -}} + {6H +} -> {2XeO3} + {4H2O} + {O2} \ uparrow}}}

{\ce {{2HXeO6^{3-}}+{6H+}->{2XeO3}+{4H2O}+{O2}\uparrow }}

Its proposed formula, H ₄ XeO ₆ , is based on the octahedral geometry of the perxenate ion (XeO ₆ ⁴⁻ ) in its alkali metal salts ^[1] ^[3] .

It was estimated that pK _{a of} xenonic acid is below zero, which makes it very strong. Xenon acid dissociates stepwise into ions :

${\ce {H4XeO6<=>{H+}+{H3XeO6^{-}}}}$ ${\ displaystyle {\ ce {H4XeO6 <=> {H +} + {H3XeO6 ^ {-}}}}}$ ${\ce {H4XeO6<=>{H+}+{H3XeO6^{-}}}}$
${\ce {{H+}+{H3XeO6^{-}}<=>{2H+}+{H2XeO6^{2-}}}}$ ${\ displaystyle {\ ce {{H +} + {H3XeO6 ^ {-}} <=> {2H +} + {H2XeO6 ^ {2-}}}}}$ ${\ce {{H+}+{H3XeO6^{-}}<=>{2H+}+{H2XeO6^{2-}}}}$
${\ce {{2H+}+{H2XeO6^{2-}}<=>{3H+}+{HXeO6^{3-}}}}$ ${\ displaystyle {\ ce {{2H +} + {H2XeO6 ^ {2 -}} <=> {3H +} + {HXeO6 ^ {3-}}}}}$ ${\ce {{2H+}+{H2XeO6^{2-}}<=>{3H+}+{HXeO6^{3-}}}}$
${\ce {{3H+}+{HXeO6^{3-}}<=>{4H+}+{XeO6^{4-}}}}$ ${\ displaystyle {\ ce {{3H +} + {HXeO6 ^ {3 -}} <=> {4H +} + {XeO6 ^ {4-}}}}}$ ${\ce {{3H+}+{HXeO6^{3-}}<=>{4H+}+{XeO6^{4-}}}}$

In this case, the H ₃ XeO ₆ ^- ion has a relatively acid value of p K _a 4.29, and the H ₂ XeO ₆ ^2– ion is 10.81 ^[4] . Usually, perxenate salts are formed with the anion XeO ₆ ^4– ^[1] ^[5] .

The acid is a very strong oxidizing agent due to the XeO ₆ ⁴⁻ ion, in which the noble gas is oxidized to the maximum oxidation state , giving off all 8 electrons from the last electron shell .

Notes

↑ ¹ ² ³ Klaening, UK; Appelman, EH Protolytic properties of perxenic acid (neopr.) // Inorganic Chemistry. - 1988. - October ( t. 27 , No. 21 ). - S. 3760-3762 . - DOI : 10.1021 / ic00294a018 .
↑ Holleman, Arnold Frederik & Wiberg, Egon (2001), Wiberg, Nils, ed., Inorganic Chemistry , San Diego / Berlin: Academic Press / De Gruyter, p. 400, ISBN 0-12-352651-5
↑ Hamilton; Ibers, J .; MacKenzie, D. Geometry of the Perxenate Ion (Eng.) // Science. - 1963. - August ( vol. 141 , no. 3580 ). - P. 532-534 . - ISSN 0036-8075 . - DOI : 10.1126 / science.141.3580.532 . - . - PMID 17738629 .
↑ Advances in Inorganic Chemistry / AG Sykes. - Academic Press, 1998. - Vol. 46. - P. 67. - ISBN 0-12-023646-X .
↑ Holleman, Arnold Frederik & Wiberg, Egon (2001), Wiberg, Nils, ed., Inorganic Chemistry , San Diego / Berlin: Academic Press / De Gruyter, p. 399, ISBN 0-12-352651-5

[klaening-1] ¹ ² ³ Klaening, UK; Appelman, EH Protolytic properties of perxenic acid (neopr.) // Inorganic Chemistry. - 1988. - October ( t. 27 , No. 21 ). - S. 3760-3762 . - DOI : 10.1021 / ic00294a018 .

[2] Holleman, Arnold Frederik & Wiberg, Egon (2001), Wiberg, Nils, ed., Inorganic Chemistry , San Diego / Berlin: Academic Press / De Gruyter, p. 400, ISBN 0-12-352651-5

[3] Hamilton; Ibers, J .; MacKenzie, D. Geometry of the Perxenate Ion (Eng.) // Science. - 1963. - August ( vol. 141 , no. 3580 ). - P. 532-534 . - ISSN 0036-8075 . - DOI : 10.1126 / science.141.3580.532 . - . - PMID 17738629 .

[4] Advances in Inorganic Chemistry / AG Sykes. - Academic Press, 1998. - Vol. 46. - P. 67. - ISBN 0-12-023646-X .

[5] Holleman, Arnold Frederik & Wiberg, Egon (2001), Wiberg, Nils, ed., Inorganic Chemistry , San Diego / Berlin: Academic Press / De Gruyter, p. 399, ISBN 0-12-352651-5

Xenon acid

Getting

Chemical Properties

See also

Notes

More articles:

Xenon acid


Are common
Systematic name	Tetrahydroxy (dioxo) xenon
Chem. formula	H ₄ XeO ₆
Physical properties
Molar mass	231.32 g / mol
Classification
Reg. CAS number
Smiles