Tetramethylammonium_pentafluoroxenate References

Tetramethylammonium pentafluoroxenate
Names
	IUPAC name Tetramethylammonium pentafluoridoxenonate(−)
	Other names Tetramethylammonium pentafluoroxenate(IV)
Identifiers
CAS Number	133042-40-7;
3D model ( JSmol)	Interactive image;
	InChI InChI=1S/C4H12N.F5Xe/c1-5(2,3)4;1-6(2,3,4)5/h1-4H3;/q+1;-1 Key: DNTNABLTOUYNBO-UHFFFAOYSA-N;
	SMILES C[N+](C)(C)C.F[Xe-](F)(F)(F)F;
Properties
Chemical formula	[N(CH3)4][XeF5
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). verify ( what is ?) Infobox references

Tetramethylammonium pentafluoroxenate is a chemical compound with the chemical formula [N(CH₃)₄⁺[XeF₅⁻. This salt consists of tetramethylammonium cations [N(CH₃)₄⁺ and pentafluoroxenate(IV) anions [XeF₅⁻. The [XeF₅⁻ ion was the first example of a pentagonal planar molecular geometry AX₅E₂ species.^[1] It was prepared by the reaction of [N(CH₃)₄]F with xenon tetrafluoride, [N(CH₃)₄]F 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 point group of D_5h.^[1]

References

^ ^a ^b ^c ^d ^e Christe, K. O.; Curtis, E. C.; Dixon, D. A.; Mercier, H. P.; Sanders, J. C. P.; Schrobilgen, G. J. (1991). "The pentafluoroxenate(IV) anion, XeF⁻
₅: the first example of a pentagonal planar AX₅ species". Journal of the American Chemical Society. 113 (9): 3351–3361. doi: 10.1021/ja00009a021.

[Christe-1] Christe, K. O.; Curtis, E. C.; Dixon, D. A.; Mercier, H. P.; Sanders, J. C. P.; Schrobilgen, G. J. (1991). "The pentafluoroxenate(IV) anion, XeF⁻
₅: the first example of a pentagonal planar AX₅ species". Journal of the American Chemical Society. 113 (9): 3351–3361. doi: 10.1021/ja00009a021.

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