Chromium(IV) fluoride

Chromium(IV) fluoride
Names
	IUPAC name Chromium(IV) fluoride
	Other names Chromium fluoride, Chromium tetrafluoride
Identifiers
CAS Number	10049-11-3;
3D model (JSmol)	Interactive image;
PubChem CID	57346073;
UNII	LXA70EM86D ;
CompTox Dashboard (EPA)	DTXSID90721095 ;
	InChI InChI=1S/Cr.4FH/h;4*1H/q+4;;;;/p-4 Key: SYJRAUIOIRVQSW-UHFFFAOYSA-J;
	SMILES [Cr+4].[F-].[F-].[F-].[F-];
Properties
Chemical formula	CrF4
Molar mass	127.9897 g·mol−1
Appearance	green crystals, amorphous brown beads
Density	2.89 g/cm3
Melting point	277 °C (531 °F; 550 K)
Boiling point	~ 400 °C (752 °F; 673 K)
Solubility in water	reacts with water
	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 hydrolyzes 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 is easily reduced.^[4]

It will react with water:

{\ce {CrF4 + 2H2O -> CrO2 + 4HF}}

References

^ ^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 2014-01-10.
^ ^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 2014-01-12.
^ Clark, H. C.; Sadana, Y. N. (1964-01-01). "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.

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[Handbook-1] Perry, Dale L. (2011). Handbook of Inorganic Compounds, Second Edition. Boca Raton, Florida: CRC Press. p. 125. ISBN 978-1-43981462-8. Retrieved 2014-01-10.

[German-2] 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 2014-01-12.

[3] Clark, H. C.; Sadana, Y. N. (1964-01-01). "Some Reactions of Chromium Tetrafluoride". Canadian Journal of Chemistry. 42 (1): 50–56. doi:10.1139/v64-008. ISSN 0008-4042.

[4] 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.

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