|Molar mass||245.28 g mol-1|
|Density||3.56 g cm-3|
|Solubility in water||reacts through water|
|except where detailed otherwise, data are offered for materials in their typical state(at 25°C, 100kPa)Infobox disclaimer and references|
Xenon hexafluoride is the chemistry compound through the formula XeF6. This colorless crystalline compound is among the three binary fluorides xenon, the various other two being XeF2 and XeF4. All are exergonic and stable at typical temperatures. XeF6 is the the strongest fluorinating agent of the series.
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Xenon hexafluoride can be prepared by permanent heating of XeF2 at about 300 degrees and also pressure 6 MPa.
The framework of XeF6 forced several years to create in contrast to the cases of xenon difluoride and also xenon tetrafluoride. In the gas step it through a contempt distorted octahedral geometry. The lacks perfect octahedral symmetry, as predicted by VSEPR theory due to the visibility of six fluoride ligands and one lone pair of electrons. Follow to Konrad Seppelt, then Associate Professor of Chemistry in ~ the college of Heidelberg, "the framework is finest described in terms of a mobile electron pair that moves over the faces and also edges the the octahedron and also thus distorts it in a dynamic manner.".<1>NMR spectra of129Xe19F6 suggest that it is tetrameric: 4 equivalent xenon atoms are arranged in a tetrahedron surrounding by a fluctuating selection of 24 fluorine atoms that interchange location in a "cogwheel mechanism".
Xenon hexafluoride hydrolyzes stepwise, ultimately affording xenon trioxide:<2>XeF6 + H2O → XeOF4 + 2 HFXeOF4 + H2O → XeO2F2 + 2 HFXeO2F2 + H2O → XeO3 + 2 HF
XeF6 serves as a Lewis acid, binding one and also two fluoride anions:XeF6 + F- → XeF7-XeF7- + F- → XeF82-
The two various other binary fluorides carry out not form such stable adducts v fluoride. The salt Rb2XeF8 is among the many robust xenon compounds, decomposing only over 400 °C.
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