Copper(II) fluoride

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Copper(II) fluoride
IUPAC name	Copper difluoride
Other names	Cupric fluoride; Copper fluoride
Identifiers
CAS number	[7789-19-7]
Properties
Molecular formula	CuF2
Molar mass	101.543 g/mol
Appearance	White crystalline powder When hydrated: Blue
Density	4200 kg/m³, solid
Melting point	836 °C (1109 ± 5 K)
Boiling point	1676 °C
Solubility in other solvents	Hygroscopic
Related compounds
Other anions	Copper(II) bromide Copper(II) chloride
Other cations	silver(II) fluoride cobalt(II) fluoride
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Copper(II) fluoride is an inorganic compound with the chemical formula CuF₂. It is a white, crystalline, hygroscopic solid. It has a rutile-type crystal structure similar to other fluorides of chemical formulae MF₂.

Contents 1 Use 2 Chemistry 3 References 4 External links

[edit] Use

It has been shown that aromatic hydrocarbons react with copper(II) fluoride, in an oxygen-containing atmosphere at temperatures above 450 °C, to form fluorinated aromatic hydrocarbons. This reaction is simpler than the Sandmeyer reaction, but is only applicable for compounds which are stable enough to survive the high temperature.^[1]

[edit] Chemistry

Copper fluoride can be synthesised from copper and fluorine at temperatures of 400 °C.

Cu + F₂ → CuF₂

It loses fluorine in molten stage at temperatures above 950 °C.

2CuF₂ → 2CuF + F₂

2CuF → CuF₂ + Cu

The complex anions of CuF₃⁻, CuF₄²⁻ and CuF₆⁴⁻ are formed if CuF₂ is exposed to substances containing fluoride ions F⁻.

[edit] References

• C. Billy, H. M. Haendler (1957). "The Crystal Structure of Copper(II) Fluoride". Journal of the American Chemical Society 79: 1049–51. doi:10.1021/ja01562a011. 
• P. C. de Mello, M. Hehenberg, S. Larson, M. Zerner (1980). "Studies of the electronic structure of copper fluorides and copper chlorides". Journal of the American Chemical Society 102: 1278–1288. doi:10.1021/ja00524a010. 
• H. M. Haendler, L. H. Towle, E. F. Bennett, W. L. Patterson (1954). "The Reaction of Fluorine with Copper and Some of its Compounds. Some Properties of Copper(II) Fluoride". Journal of the American Chemical Society 76: 2178–2179. doi:10.1021/ja01637a039. 
• T. C. Ehlert, J. S. Wang (1977). "Thermochemistry of the copper fluorides". Journal of Physical Chemistry 81: 2069–2073. doi:10.1021/j100537a005. 

[edit] External links

• National Pollutant Inventory - Copper and compounds fact sheet
• National Pollutant Inventory - Fluoride and compounds fact sheet