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Names | |
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IUPAC name
Copper(I) fluoride
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Systematic IUPAC name
Fluorocopper
[1] | |
Other names
Cuprous fluoride
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Identifiers | |
3D model (
JSmol)
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ChemSpider | |
PubChem
CID
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CompTox Dashboard (
EPA)
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Properties | |
CuF | |
Molar mass | 82.544 g·mol−1 |
Density | 7.1 g cm−3 |
Structure | |
sphalerite | |
Hazards | |
GHS labelling: | |
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Warning | |
NFPA 704 (fire diamond) | |
NIOSH (US health exposure limits): | |
PEL (Permissible)
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TWA 1 mg/m3 (as Cu) [2] |
REL (Recommended)
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TWA 1 mg/m3 (as Cu) [2] |
IDLH (Immediate danger)
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TWA 100 mg/m3 (as Cu) [2] |
Related compounds | |
Other
anions
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Copper(I) chloride Copper(I) bromide Copper(I) iodide |
Other
cations
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Silver(I) fluoride Gold(I) fluoride |
Related compounds
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Copper(II) fluoride |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
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Copper(I) fluoride or cuprous fluoride is an inorganic compound with the chemical formula CuF. Its existence is uncertain. 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]. [7]