Chromium(IV) fluoride

Chromium(IV) fluoride is an inorganic compound with the chemical formula CrF4.

Chromium(IV) fluoride
Names
IUPAC name
Chromium(IV) fluoride
Other names
Chromium fluoride, Chromium tetrafluoride
Identifiers
3D model (JSmol)
UNII
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

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:

CrF4+2 H2O->CrO2+4 HF

References

  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.
  2. Brauer, Georg (1963) [1960]. Handbuch Der Präparativen Anorganischen Chemie [Handbook of Preparative Inorganic Chemistry] (in German). 1. Stuttgart; New York, New York: Ferdinand Enke Verlag; Academic Press, Inc. p. 258. ISBN 978-0-32316127-5. Retrieved 2014-01-12.


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