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Cobalt(II) fluoride
2.22 g/cm3 (tetrahydrate) insoluble in alcohol, ether, benzene orthorhombic (tetrahydrate) | NFPA-H = 3 | NFPA-F = 0 | NFPA-R = 0 | NFPA-S =

Cobalt(II) fluoride is an inorganic compound with the formula CoF2. It is a pink paramagnetic solid. Like some other metal difluorides, CoF2 crystallizes in the rutile structure, which features octahedral Co centers and planar fluorides.
Preparation and reactions
Treating anhydrous cobalt chloride with hydrogen fluoride gives cobalt(II) fluoride: :
Tetrahydrated cobalt(II) fluoride is formed by dissolving cobalt(II) in hydrofluoric acid. The anhydrous fluoride can be extracted from this by dehydration. Other synthesis can occur at higher temperatures.
Cobalt(II) fluoride reacts with fluorine to give cobalt(III) fluoride: : The latter is a catalyst for fluorination reactions.
References
References
- (2005). "Ullmann's Encyclopedia of Industrial Chemistry".
- (1954). "The Crystal Structure of MnF2, FeF2, CoF2, NiF2 and ZnF2". J. Am. Chem. Soc..
- (1963). "Handbook of Preparative Inorganic Chemistry, 2nd Ed.". Academic Press.
- J.C. Bailar. (1973). "Comprehensive Inorganic Chemistry". Pergoamon.
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