- Tetramethylammonium pentafluoroxenate
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IUPACName = Tetramethylammonium pentafluoridoxenonate(−)
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Formula = N(CH3)4XeF5
MolarMass = 300.4308 g/mol
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Autoignition =Tetramethylammonium pentafluoroxenate is the chemical compound with the formula N(CH3)4XeF5. The XeF5− ion it contains was the first example of a planar pentagonal AX5E2 species.The pentafluoroxenate(IV) anion, XeF5−: the first example of a pentagonal planar AX5 species, Christe K. O., Curtis E. C., Dixon D. A., Mercier H. P.,. Sanders J. C. P, Schrobilgen G. J.,J. Am. Chem. Soc.; 1991; 113(9); 3351-3361 doi|10.1021/ja00009a021] 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). The anion is planar, with the fluorine atoms in a slightly distorted pentagonal coordination (Xe-F bond lengths ranging from 197.9 - 203.4 pm and Xe-F bond angles ranging from 71.5 - 72.3 °). Other salts have been prepared with sodium, caesium and rubidium, and vibrational spectra shows that these contain the same planar ion.References
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