Copper(II) fluoride

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Copper(II) fluoride

General
Systematic name	Copper difluoride
Molecular formula	Cu F₂
Molar mass	101.543 g/mol
Appearance	White crystalline powder When hydrated: Blue
Other names	Cupric fluoride; Copper fluoride
CAS number	[7789-19-7]
EINECS	232-147-3
SMILES	[F-].[F-].[Cu+2]
InChI	1/Cu.2FH/h;2*1H/q+2;;/p-2
Properties
Density and phase	4200 kg/m³, solid
Solubility	Hygroscopic
Melting point	836°C (1109 +/- 5 K)
Boiling point	1676 °C
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.

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^-, CuF₄^2- and CuF₆^4- are formed if copper fluoride is mixed with substances containing fluoride ions F^-.

[edit] References

^ M. A. Subramanian, L. E. Manzer (2002). "A "Greener" Synthetic Route for Fluoroaromatics via Copper (II) Fluoride". Science 297: 1665. DOI:10.1126/science.1076397.

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.