World Library  
Flag as Inappropriate
Email this Article

Cobalt(III) fluoride

Article Id: WHEBN0003107628
Reproduction Date:

Title: Cobalt(III) fluoride  
Author: World Heritage Encyclopedia
Language: English
Subject: Cobalt, Cobalt(II) chlorate, Cobalt(II) oxalate, Cobalt(II) selenide, Cobalt(II) phosphide
Publisher: World Heritage Encyclopedia

Cobalt(III) fluoride

Dangerous for the Environment (Nature) N|
Cobalt(III) fluoride
Cobalt(III) fluoride
Other names
Cobalt trifluoride
Cobaltic fluoride
Cobalt fluoride
Cobaltic trifluoride
ChemSpider  YesY
EC number 233-062-4
Jmol-3D images Image
small=yes}}} }}} 0}}} 1=C|C} }}} 1=H|H} }}} 1=Ac|Ac} }}} 1=Ag|Ag} }}} 1=Al|Al} }}} 1=Am|Am} }}} 1=Ar|Ar} }}} 1=As|As} }}} 1=At|At} }}} 1=Au|Au} }}} 1=B|B} }}} 1=Ba|Ba} }}} 1=Be|Be} }}} 1=Bh|Bh} }}} 1=Bi|Bi} }}} 1=Bk|Bk} }}} 1=Br|Br} }}} 1=Ca|Ca} }}} 1=Cd|Cd} }}} 1=Ce|Ce} }}} 1=Cf|Cf} }}} 1=Cn|Cn} }}} 1=Cl|Cl} }}} 1=Cm|Cm} }}} 1=Co|Co} }}} 1=Cr|Cr} }}} 1=Cs|Cs} }}} 1=Cu|Cu} }}} 1=Db|Db} }}} 1=Ds|Ds} }}} 1=Dy|Dy} }}} 1=Er|Er} }}} 1=Es|Es} }}} 1=Eu|Eu} }}} 1=F|F} }}} 1=Fe|Fe} }}} 1=Fl|Fl} }}} 1=Fm|Fm} }}} 1=Fr|Fr} }}} 1=Ga|Ga} }}} 1=Gd|Gd} }}} 1=Ge|Ge} }}} 1=He|He} }}}}

Appearance brown powder
Density 3.88 g/cm3
Melting point 92 °C (198 °F; 365 K)
NFPA 704
Related compounds
Other anions
cobalt(III) oxide, cobalt(III) chloride
Other cations
iron(III) fluoride, rhodium(III) fluoride
Related compounds
cobalt(II) fluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
 YesY  (: YesY/N?)

Cobalt(III) fluoride is the [1] CoF3 is a powerful fluorinating agent that leaves CoF2 as the byproduct.


CoF3 is prepared in the laboratory by treating CoCl2 with fluorine at 250 °C:[2]

CoCl2 + 3/2 F2 → CoF3 + Cl2

This conversion is a redox reaction: Co2+ and Cl are oxidized to Co3+ and Cl2, respectively, while F2 is reduced to F. Cobalt(II) oxide (CoO) and cobalt(II) fluoride (CoF2) can also be converted to cobalt(III) fluoride using fluorine.


CoF3 decomposes upon contact with water to give oxygen:

4 CoF3 + 2 H2O → 4 HF + 4 CoF2 + O2

CoF3 is hygroscopic, forming a dihydrate (CAS#54496-71-8). It reacts with fluoride sources to give the anion [CoF6]3−, which is a rare example of a high-spin, octahedral cobalt(III) complex.


Used as slurry, CoF3 converts hydrocarbons to the perfluorocarbons:

2CoF3 + R-H → 2CoF2 + R-F + HF

Such reactions are sometimes accompanied by rearrangements or other reactions.[1] The related reagent KCoF4 is more selective.[3]


  1. ^ a b Coe, P. L. "Cobalt(III) Fluoride" in Encyclopedia of Reagents for Organic Synthesis (Ed: L. Paquette) 2004, J. Wiley & Sons, New York. doi:10.1002/047084289X.rc185.
  2. ^ Priest, H. F. "Anhydrous Metal Fluorides" Inorganic Syntheses McGraw-Hill: New York, 1950; Vol. 3, pages 171-183. doi:10.1002/9780470132340.ch47
  3. ^ Coe, P. L. "Potassium Tetrafluorocobaltate(III)" in Encyclopedia of Reagents for Organic Synthesis (Ed: L. Paquette) 2004, J. Wiley & Sons, New York. doi:10.1002/047084289X.rp251.

External links

  • National Pollutant Inventory - Cobalt fact sheet
  • National Pollutant Inventory - Fluoride and compounds fact sheet
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.