Английская Википедия:Chromium pentafluoride

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Chromium pentafluoride is the inorganic compound with the chemical formula CrF5.[1] It is a red volatile solid that melts at 34 °C.[2] It is the highest known chromium fluoride, since the hypothetical chromium hexafluoride has not yet been synthesized.[3]

Chromium pentafluoride is one of the products of the action of fluorine on a mixture of potassium and chromic chlorides.[4]

In terms of its structure, the compound is a one-dimensional coordination polymer. Each Cr(V) center has octahedral molecular geometry.[5] It has the same crystal structure as vanadium pentafluoride.[6]

Chromium pentafluoride is strongly oxidizing, able to fluorinate the noble gas xenon and oxidize dioxygen to dioxygenyl.[5] Due to this property, it decomposes readily in the presence of reducing agents, and easily hydrolyses to chromium(III) and chromium(VI).[7]

Reactions

Chromium pentafluoride can react with Lewis bases such as caesium fluoride and nitryl fluoride to give the respective hexafluorochromate(V) salt.[8]

CrF5 + CsF → CsCrF6

Chromium pentafluoride can also react with the Lewis acid antimony pentafluoride to give the CrF5·2SbF5 adduct. The adduct was found to be a strong oxidizing agent, liquid at room temperature with a melting point of −23 °C.[8]

See also

References

Шаблон:Reflist Шаблон:Chromium compounds Шаблон:Fluorine compounds

  1. Шаблон:Cite book
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  3. Шаблон:Cite journal
  4. Шаблон:Cite book
  5. 5,0 5,1 Шаблон:Cite journal
  6. Шаблон:Cite book
  7. Шаблон:Cite book
  8. 8,0 8,1 Шаблон:Cite journal