Tetramethylammonium pentafluoroxenate

Tetramethylammonium pentafluoroxenate
Names
	IUPAC name Tetramethylammonium pentafluoridoxenonate(−)
Identifiers
Properties
Chemical formula	N(CH3)4XeF5
Molar mass	300.4308 g/mol
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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	Infobox references

Tetramethylammonium pentafluoroxenate is the chemical compound with the formula N(CH₃)₄XeF₅. The XeF⁻
₅ ion it contains was the first example of a planar pentagonal AX₅E₂ species.^[1] It was prepared by the reaction of N(CH₃)₄F with xenon tetrafluoride, N(CH₃)₄F being chosen because it can be prepared in anhydrous form and is readily soluble in organic solvents.^[1] The anion is planar, with the fluorine atoms in a slightly distorted pentagonal coordination (Xe–F bond lengths 197.9–203.4 pm, and F–X–F bond angles 71.5–72.3°).^[1] Other salts have been prepared with sodium, caesium and rubidium, and vibrational spectra show that these contain the same planar ion.^[1] The isolated anion has the unusual point group of D_5d.

References

1 2 3 4 Christe K. O., Curtis E. C., Dixon D. A., Mercier H. P.,. Sanders J. C. P, Schrobilgen G. J. (1991). "The pentafluoroxenate(IV) anion, XeF₅⁻: the first example of a pentagonal planar AX₅ species". J. Am. Chem. Soc. 113 (9): 3351–3361. doi:10.1021/ja00009a021.

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[Christe-1] 1 2 3 4 Christe K. O., Curtis E. C., Dixon D. A., Mercier H. P.,. Sanders J. C. P, Schrobilgen G. J. (1991). "The pentafluoroxenate(IV) anion, XeF₅⁻: the first example of a pentagonal planar AX₅ species". J. Am. Chem. Soc. 113 (9): 3351–3361. doi:10.1021/ja00009a021.