Xenon trioxide

Xenontrioxid

White, explosive crystals

Fixed

4.55 g · cm -3

Explosive decomposition: 25 ° C

Readily soluble in water

Template: Infobox chemical / molecular formula search is not possible

Xenon (VI ) oxide ( molecular formula XeO3 ) is a chemical compound of the elements of xenon and oxygen. Xenontrioxid is unstable and prone to explosive decomposition. This occurs at about 25 ° C. It is one of the few known noble gas compounds that can be dissolved in water. This results in a minor part of the unstable xenon acid ( H2XeO4 ).

Representation

Xenontrioxid can not be expressed directly, since the electronegativity of oxygen for the direct reaction is not sufficient. Therefore, we first prepared xenon difluoride by letting react under high pressure and high temperature xenon with fluorine. The xenon difluoride reacts with disproportionation to xenon tetrafluoride and xenon, xenon hexafluoride and xenon difluoride then. Recently, the fluorine is in the connection replaced by oxygen by reaction with alkali and calcium salts, intermediate products such Xenontetrafluoridoxid and Xenondifluoriddioxid arise.

Typical reactions of Xenontrioxid

  • In strongly alkaline solution a hydroxide ion (OH - ) is added so that HXeO4 - created. This HXeO4 - disproportionates gradually Xenat ( XeVIII! ) And xenon ( xe0 ). It can then isolate Perxenate as eg Na4XeO6 · 6H2O.
  • By adding concentrated. Sulfuric acid ( H2SO4) can be obtained from the yellow Perxenat solutions (eg Ba2XeO6 ) the gaseous, highly explosive anhydride Xenontetroxid ( XeO4 ).
  • Xenate ( VI), in the form of XeO3, and Perxenate ( VIII) are among the strongest oxidizing agents. ( Standard electrode potentials: E0 ( Xe/XeO3 ) = 1.8 V, E0 ( Xe/XeO64- ) = 3.0 V). They are all the more interesting because on reduction only elemental xenon is produced which can be used again and again.
  • Quantitative reduction of XeO3 by I-:
  • There are (or were in 1992 ) Notes on the development of Xenat - esters at the violent reaction of alcohols with XeO3
  • While conducting of ozone ( O3) by a dilute solution XeO3 arise Perxenate (Xe VIII), which can form stable sodium and barium
CAS registry number Chemical element Xenon tetroxide
830679
de