Perxenonic acid

Structural formula
General
Surname	Perxenonic acid
Molecular formula	H 4 XeO 6
External identifiers / databases
Wikidata	Q2702020
properties
Molar mass	231.32 g mol −1
Physical state	liquid
pK s value	<0 (H 4 XeO 6 ); 4.29 ± 0.03 (H 3 XeO 6 - ); 10.75 ± 0.04 (H 2 XeO 6 2− ); > 14 (HXeO 6 3− );
safety instructions
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Perxenonic acid is an oxygen acid of xenon , which can only exist in an aqueous solution. Their salts are the Perxenate XeO ₆⁴⁻ .

Extraction and presentation

Perxenonic acid is produced by introducing xenon (VIII) oxide into water.

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

The perxenate ion XeO ₆⁴⁻ forms during the disproportionation of the xenonic acid H ₂ XeO ₄ .

${\ displaystyle {\ ce {2HXeO4 _ {(aq)} - + 2OH _ {(aq)} - -> XeO6 _ {(aq)} ^ {4} - + Xe + O2 + 2H2O _ {(l)}}}}$

properties

Analogous to xenonic acid , perxenonic acid and perxenate are also strong oxidizing agents . The pH of the solution should be between −0.2 and 13. The binding energy of H ₃ XeO ₆^- is 25 ° C at 0 ± 5 kJ · mol ^-1 and the H ₂ XeO ₆² at 3 ± 2 kJ · mol ^-1 . It has the same structure as telluric acid and is said to share the properties of periodic acid .

Perxenonic acid cannot be isolated as it rapidly decomposes in acidic conditions into xenon (VI) oxide , water and oxygen .

${\ displaystyle {\ ce {HXeO6 ^ {3} - + 3H + -> XeO3 + 2H2O + {\ frac {1} {2}} O2}}}$

Because of this rapid decomposition, the protonation of H ₃ XeO ₆^- in H ₄ XeO _{6 is also} not possible.

Salts of perxenonic acid, the perxenates , are already known, such as barium perxenate Ba ₂ XeO ₆ or sodium perxenate Na ₄ XeO ₆ . The latter has even been used successfully for the analytical oxidation of Am ³⁺ to Am ⁶⁺ .

literature

Walter C. Hamilton, James A. Ibers, Donald R. Mackenzie: Geometry of the Perxenate Ion . Science, Aug. 9, 1963, pp. 532-534 , doi : 10.1126 / science.141.3580.532 .

Individual evidence

↑ ^a ^b ^c ^d John H. Holloway, Eric G. Hope: Recent Advances in Noble-Gas Chemistry . In: Advances in Inorganic Chemistry . tape 46 . Academic Press, 1998, ISBN 0-08-057895-0 , pp. 51-100 , doi : 10.1016 / S0898-8838 (08) 60149-X .
↑ ^a ^b ^c Ulrik K. Klaening, EH Appelman: Protolytic properties of perxenic acid . October 1988, p. 3760-3762 , doi : 10.1021 / ic00294a018 .
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
↑ David W. Oxtoby, Wade A. Freeman, Toby F. Block: Chemistry 4th Edition . ISBN 0-03-033188-9 , chap. 4 , p. 87AP .
^ Catherine E. Housecroft, AG Sharpe: Inorganic Chemistry . Pearson Education, 2005, ISBN 0-13-039913-2 , pp. 499 .
↑ Bruno Jaselskis, Stanislaus Vas: Xenic Acid Reactions with vic-Diols . J. Am. Chem. Soc, 1964, pp. 2078-2079 , doi : 10.1021 / ja01064a041 .
↑ HP Holcomb: Analytical Oxidation of Americium with Sodium Perxenate . Anal. Chem., March 1965, pp. 415 , doi : 10.1021 / ac60222a002 .

[Advances_in_Inorganic_Chemistry-1] John H. Holloway, Eric G. Hope: Recent Advances in Noble-Gas Chemistry . In: Advances in Inorganic Chemistry . tape 46 . Academic Press, 1998, ISBN 0-08-057895-0 , pp. 51-100 , doi : 10.1016 / S0898-8838 (08) 60149-X .

[Protolytic_properties_of_perxenic_acid-2] Ulrik K. Klaening, EH Appelman: Protolytic properties of perxenic acid . October 1988, p. 3760-3762 , doi : 10.1021 / ic00294a018 .

[NV-3] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[4] David W. Oxtoby, Wade A. Freeman, Toby F. Block: Chemistry 4th Edition . ISBN 0-03-033188-9 , chap. 4 , p. 87AP .

[5] Catherine E. Housecroft, AG Sharpe: Inorganic Chemistry . Pearson Education, 2005, ISBN 0-13-039913-2 , pp. 499 .

[6] Bruno Jaselskis, Stanislaus Vas: Xenic Acid Reactions with vic-Diols . J. Am. Chem. Soc, 1964, pp. 2078-2079 , doi : 10.1021 / ja01064a041 .

[7] HP Holcomb: Analytical Oxidation of Americium with Sodium Perxenate . Anal. Chem., March 1965, pp. 415 , doi : 10.1021 / ac60222a002 .