Nitrosonium octafluoroxenate(VI)

Nitrosonium octafluoroxenate(VI)
	; The square antiprismatic [XeF8]2− anion in (NO)2XeF8
Names
	IUPAC name Nitrosonium octafluoroxenate(VI)
Identifiers
3D model (JSmol)	Interactive image;
	InChI InChI=1S/F8Xe.2NO/c1-9(2,3,4,5,6,7)8;21-2/q-2;2+1 Key: UZLZIYXSQHCOGO-UHFFFAOYSA-N;
	SMILES [N]#[O+].[N]#[O+].F[Xe-2](F)(F)(F)(F)(F)(F)[F];
Properties
Chemical formula	(NO); 2XeF; 8
Density	3.354 g/cm3
Solubility in water	Reacts
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Nitrosonium octafluoroxenate(VI) is a chemical compound of xenon with nitrogen, oxygen, and fluorine, having formula (NO)
₂XeF
₈. It is an ionic compound containing well-separated nitrosonium cations (NO⁺) and octafluoroxenate(VI) anions (XeF²⁻
₈). The molecular geometry of the octafluoroxenate(VI) ion is square antiprismatic, having Xe–F bond lengths of 1.971 Å, 1.946 Å, 1.958 Å, 2.052 Å, and 2.099 Å.

It is synthesized by the reaction of xenon hexafluoride (XeF
₆) with nitrosyl fluoride (NOF):

XeF
₆ + 2 NOF → (NO)
₂XeF
₈

Other compounds containing the octafluoroxenate(VI) ion include its alkali metal salts, including Cs₂XeF₈ and Rb₂XeF₈, which are stable up to 400 °C.

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