Chromium(IV) fluoride
From Wikipedia, the free encyclopedia
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| IUPAC name
Chromium(IV) fluoride
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| Other names
Chromium fluoride, Chromium tetrafluoride
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| Identifiers | |
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3D model (JSmol)
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| ChemSpider | |
PubChem CID
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| UNII |
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CompTox Dashboard (EPA)
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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).
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Chemical compound
Chromium(IV) fluoride is an inorganic compound with the chemical formula CrF4. It has a dark greenish-black color when solid. It rapidly hydrolyzes in presence of moisture in air or directly in water.[3]
Synthesis
[edit ]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
[edit ]Chromium(IV) fluoride is easily reduced.[4]
It will react with water:
- CrF4 + 2H2O → CrO2 + 4HF
References
[edit ]- ^ a b c d Perry, Dale L. (2011). Handbook of Inorganic Compounds, Second Edition. Boca Raton, Florida: CRC Press. p. 125. ISBN 978-1-43981462-8 . Retrieved 2014年01月10日.
- ^ a b c Brauer, Georg (1963) [1960]. Handbuch Der Präparativen Anorganischen Chemie [Handbook of Preparative Inorganic Chemistry] (in German). Vol. 1. Stuttgart; New York, New York: Ferdinand Enke Verlag; Academic Press, Inc. p. 258. ISBN 978-0-32316127-5 . Retrieved 2014年01月12日.
- ^ Clark, H. C.; Sadana, Y. N. (1964年01月01日). "Some Reactions of Chromium Tetrafluoride". Canadian Journal of Chemistry. 42 (1): 50–56. doi:10.1139/v64-008 . ISSN 0008-4042.
- ^ Benjamin, Sophie L.; Levason, William; Reid, Gillian (2013). "Medium and high oxidation state metal/Non-metal fluoride and oxide–fluoride complexes with neutral donor ligands". Chem. Soc. Rev. 42 (4): 1473. doi:10.1039/C2CS35263J. PMID 23014811.
