Difference between revisions of "Oxygen difluoride"
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| − | '''Oxygen difluoride''', OF<sub>2</sub>, sometimes known as '''difluorine monoxide''', is the most stable of the binary compounds of [[oxygen]] and [[fluorine]].<ref name="G&E"/> | + | '''Oxygen difluoride''', OF<sub>2</sub>, sometimes known as '''difluorine monoxide''', is the most stable of the binary compounds of [[oxygen]] and [[fluorine]].<ref name="G&E"/> It was discovered as a byproduct of fluorine production using [[Moissan cell]]s ([[electrolysis]] of [[Hydrogen fluoride|HF]]/[[Potassium fluoride|KF]]) due to small amounts of water in the electrolyte.<ref>{{citation | last1 = Lebeau | first1 = P. | last2 = Damiens | first2 = A. | title = Sur l'existence d'un composé oxygéné du fluor | journal = C. R. Hebd. Acad. Sci. Paris | year = 1927 | volume = 185 | pages = 652–54 | url = http://gallica.bnf.fr/ark:/12148/bpt6k31384/f652.image}}.</ref> A more satisfactory method of preparation is the reaction of fluorine with 2% aqueous [[sodium hydroxide]] solution followed by [[fractional distillation]] of the gas produced.<ref>{{citation | last1 = Lebeau | first1 = P. | last2 = Damiens | first2 = A. | title = Sur un nouveau mode de préparation du fluorure d'oxygène | journal = C. R. Hebd. Acad. Sci. Paris | year = 1929 | volume = 188 | pages = 1253–55 | url = http://gallica.bnf.fr/ark:/12148/bpt6k31417/f1253.image}}.</ref><ref>{{citation | last = Yost | first = D. M. | title = Oxygen Fluoride | journal = Inorg. Synth. | year = 1939 | volume = 1 | pages = 109–11}}.</ref> |
==Notes and references== | ==Notes and references== | ||
Revision as of 07:35, 31 December 2010
| Oxygen difluoride | |
|---|---|
| Identifiers | |
| InChI | InChI=1/F2O/c1-3-2 |
| InChIKey | UJMWVICAENGCRF-UHFFFAOYAI |
| Standard InChI | InChI=1S/F2O/c1-3-2 |
| Standard InChIKey | UJMWVICAENGCRF-UHFFFAOYSA-N |
| CAS number | [] |
| EC number | |
| ChemSpider | |
| Properties[1][2][3] | |
| Chemical formula | OF2 |
| Molar mass | 55.996 g mol−1 |
| Appearance | colourless gas |
| Density | 1.90 g cm−3 (liquid, −223.8 °C) |
| Melting point |
−223.8 °C (49.4 K) |
| Boiling point |
−145.3 °C (127.9 K) |
| Thermochemistry[4] | |
| Std enthalpy of formation ΔfH |
+24.52 kJ mol−1 |
| Standard molar entropy S |
247.46 J K−1 mol−1 |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) | |
Oxygen difluoride, OF2, sometimes known as difluorine monoxide, is the most stable of the binary compounds of oxygen and fluorine.[1] It was discovered as a byproduct of fluorine production using Moissan cells (electrolysis of HF/KF) due to small amounts of water in the electrolyte.[5] A more satisfactory method of preparation is the reaction of fluorine with 2% aqueous sodium hydroxide solution followed by fractional distillation of the gas produced.[6][7]
Notes and references
Notes
References
- ↑ 1.0 1.1 Greenwood, Norman N.; Earnshaw, A. Chemistry of the Elements; Pergamon: Oxford, 1984; pp 748–49. ISBN 0-08-022057-6.
- ↑ CRC Handbook of Chemistry and Physics, 62nd ed.; Weast, Robert C., Ed.; CRC Press: Boca Raton, FL, 1981; p B-126. ISBN 0-8493-0462-8.
- ↑ Streng, Alex G. Miscibility and Compatibility of Some Liquid and Solidified Gases at Low Temperature. J. Chem. Eng. Data 1971, 16 (3), 357–59. DOI: 10.1021/je60050a024.
- ↑ Difluorine monoxide. In NIST Chemistry WebBook; National Institute for Standards and Technology, <http://webbook.nist.gov/cgi/inchi/InChI%3D1S/F2O/c1-3-2>. (accessed 31 December 2010).
- ↑ Lebeau, P.; Damiens, A. Sur l'existence d'un composé oxygéné du fluor. C. R. Hebd. Acad. Sci. Paris 1927, 185, 652–54, <http://gallica.bnf.fr/ark:/12148/bpt6k31384/f652.image>.
- ↑ Lebeau, P.; Damiens, A. Sur un nouveau mode de préparation du fluorure d'oxygène. C. R. Hebd. Acad. Sci. Paris 1929, 188, 1253–55, <http://gallica.bnf.fr/ark:/12148/bpt6k31417/f1253.image>.
- ↑ Yost, D. M. Oxygen Fluoride. Inorg. Synth. 1939, 1, 109–11.
External links
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See also the corresponding article on Wikipedia. |
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