Chemistry:Chromium(IV) fluoride
From HandWiki
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| Names | |
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| IUPAC name
Chromium(IV) fluoride
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| Other names
Chromium fluoride, Chromium tetrafluoride
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| Identifiers | |
3D model (JSmol)
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PubChem CID
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| UNII | |
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| Properties | |
| CrF4 | |
| Molar mass | 127.9897 g·mol−1 |
| Appearance | green crystals,[1] amorphous brown beads[2] |
| Density | 2.89 g/cm3[1] |
| Melting point | 277 °C (531 °F; 550 K)[1] |
| Boiling point | ~ 400 °C (752 °F; 673 K)[2] |
| reacts with water[1] | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Chromium(IV) fluoride is an inorganic compound with the chemical formula CrF4. It has a dark greenish-black color when solid. It rapidly hydrolysizes in presence of moisture in air or directly in water.[3]
Synthesis
Powdered chromium or CrCl3 is exposed to fluorine gas at a temperature of 350-500 °C, which creates a mix of CrF4 and CrF5. The CrF4 settles out as varnish-like brown beads upon cooling.[2]
Reactions
Chromium(IV) fluoride will react with water:
- [math]\ce{ CrF4 + 2H2O -> CrO2 + 4HF }[/math]
References
- ↑ 1.0 1.1 1.2 1.3 Perry, Dale L. (2011). Handbook of Inorganic Compounds, Second Edition. Boca Raton, Florida: CRC Press. p. 125. ISBN 978-1-43981462-8. https://books.google.com/books?id=SFD30BvPBhoC. Retrieved 2014-01-10.
- ↑ 2.0 2.1 2.2 Brauer, Georg (1963) (in de). Handbuch Der Präparativen Anorganischen Chemie. 1. Stuttgart; New York, New York: Ferdinand Enke Verlag; Academic Press, Inc.. p. 258. ISBN 978-0-32316127-5. https://books.google.com/books?id=kaa2qeFRXmUC. Retrieved 2014-01-12.
- ↑ Clark, H. C.; Sadana, Y. N. (1964-01-01). "Some Reactions of Chromium Tetrafluoride" (in en). Canadian Journal of Chemistry 42 (1): 50–56. doi:10.1139/v64-008. ISSN 0008-4042. http://www.nrcresearchpress.com/doi/10.1139/v64-008.
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