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| Xenon tetrafluoride | |
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| IUPAC name | Xenon tetrafluoride |
| Identifiers | |
| CAS number | 13709-61-0 |
| Properties | |
| Molecular formula | XeF4 |
| Molar mass | 207.2836 g mol−1 |
| Appearance | White solid |
| Density | 4.040 g cm−3, solid |
| Boiling point |
117 °C (390 K) |
| Structure | |
| Coordination geometry |
D4h |
| Molecular shape | square planar |
| Dipole moment | 0 D |
| Hazards | |
| Flash point | ? °C |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox references |
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Xenon tetrafluoride, XeF4, is one of the chemical compounds derived from the noble gas xenon. It was the first discovered noble gas compound containing a noble gas and exactly one other element.1 It forms by the reaction of Xe and F2 in the ratio of 1 mol Xe to 2 mol F2.23 The process is exothermic, releasing 251 kJ per mol of Xe.1
The structure was determined by NMR spectroscopy and x-ray crystallography in 1963.45 The structure is square planar. This structure is justified by VSEPR theory because xenon has two lone pairs of electrons above and below the plane of the molecule.6
Xenon tetrafluoride occurs as colorless crystals. It sublimes at 115.7 °C (240.26 °F).
Xenon fluorides are all exergonic and stable at normal temperatures. They react readily with water, even pulling water from air, so they must be kept in anhydrous conditions.
References
- ^ a b Zumdahl. Chemistry, 243. ISBN 0-618-52844-X.
- ^ Claassen, H. H.; Selig, H.; Malm, J. G. (1962). "Xenon Tetrafluoride". J. Am. Chem. Soc. 84 (18): 3593. doi:.
- ^ C. L. Chernick, H. H. Claassen, P. R. Fields 1, H. H. Hyman, J. G. Malm, W. M. Manning, M. S. Matheson, L. A. Quarterman, F. Schreiner, H. H. Selig, I. Sheft, S. Siegel, E. N. Sloth, L. Stein, M. H. Studier, J. L. Weeks, and M. H. Zirin (1962). "Fluorine Compounds of Xenon and Radon". Science 138 (3537): 136–138. doi:. PMID 17818399.
- ^ Thomas H. Brown, E. B. Whipple, and Peter H. Verdier (1963). "Xenon Tetrafluoride: Fluorine-19 High-Resolution Magnetic Resonance Spectrum". Science 140 (3563): 178. doi:. PMID 17819836.
- ^ James A. Ibers and Walter C. Hamilton (1963:). "Xenon Tetrafluoride: Crystal Structure". Science 139 (3550): 106–107. doi:. PMID 17798707.
- ^ "What are the chemical properties of xenon tetrafluoride?" WikiAnswers. Access date 9/17/08. link
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