Copper(I) fluoride

Copper(I) fluoride or cuprous fluoride is an inorganic compound with the chemical formula CuF.

It was reported in 1933 to have a sphalerite-type crystal structure.

[3] Modern textbooks state that CuF is not known,[4] since fluorine is so electronegative that it will always oxidise copper to its +2 oxidation state.

[5] Complexes of CuF such as [(Ph3P)3CuF] are, however, known and well characterised.

[6] Unlike other copper(I) halides like copper(I) chloride, copper(I) fluoride tends to disproportionate into copper(II) fluoride and copper in a one-to-one ratio at ambient conditions, unless it is stabilised through complexation as in the example of [Cu(N2)F].

NFPA 704 four-colored diamond Health 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gas Flammability 0: Will not burn. E.g. water Instability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogen Special hazards (white): no code