Caesium heptafluoroxenate

Caesium heptafluoroxenate is an inorganic compound of caesium, and fluorine, and xenon with the chemical formula Cs[XeF₇]. It consists of caesium cations Cs⁺ and heptafluoroxenate(VI) anions [XeF₇]⁻.

Caesium heptafluoroxenate

Identifiers
CAS Number	19033-04-6 Y
3D model (JSmol)	Interactive image
InChI InChI=1S/Cs.F7Xe/c;1-8(2,3,4,5,6)7/q+1;-1 Key: IAPXLONHTNZYMY-UHFFFAOYSA-N
SMILES [Cs+].F[Xe-](F)(F)(F)(F)(F)F
Properties
Chemical formula	Cs[XeF7]
Molar mass	397.187 g·mol−1
Appearance	yellow solid
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Preparation

Caesium heptafluoroxenate can be prepared by dissolving caesium fluoride in liquid xenon hexafluoride:^[1]

CsF + XeF₆ → Cs[XeF₇]

Properties

Caesium heptafluoroxenate is a yellow solid that is stable at room temperature. It is a very strong oxidizer. The compound decomposes at 50 °C to produce caesium octofluoroxenate:^[2]

2 Cs[XeF₇] → Cs₂[XeF₈] + XeF₆

Uses

Caesium heptafluoroxenate is used to isolate xenon hexafluoride from a reaction mixture.