Tetramethylammonium pentafluoroxenate

Tetramethylammonium pentafluoroxenate

Names
IUPAC name Tetramethylammonium pentafluoridoxenonate(−)
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).
verify (what is  ?)
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 shows that these contain the same planar ion.^[1]

References

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, XeF₅⁻: the first example of a pentagonal planar AX₅ species". J. Am. Chem. Soc. 113 (9): 3351–3361. doi:10.1021/ja00009a021.