The square antiprismatic [XeF82− anion in (NO)2XeF8
[1]
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Names | |||
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IUPAC name
Nitrosonium octafluoroxenate(VI)
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Identifiers | |||
3D model (
JSmol)
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Properties | |||
(NO) 2XeF 8 | |||
Density | 3.354 g/cm3 | ||
Reacts | |||
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
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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.
[1]
It is synthesized by the reaction of
xenon hexafluoride (XeF
6) with
nitrosyl fluoride (NOF):
[2]
Other compounds containing the octafluoroxenate(VI) ion include its alkali metal salts, including Cs2XeF8 and Rb2XeF8, which are stable up to 400 °C. [3] [4]