Copper(I) fluoride

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]

Copper(I) fluoride

Names
IUPAC name Copper(I) fluoride
Systematic IUPAC name Fluorocopper[1]
Other names Cuprous fluoride
Identifiers
CAS Number	13478-41-6^N
3D model (JSmol)	Interactive image Interactive image
ChemSpider	2341261^Y
PubChem CID	3084153
CompTox Dashboard (EPA)	DTXSID50158944
InChI InChI=1S/Cu.FH/h;1H/q+1;/p-1^Y Key: BMRUOURRLCCWHB-UHFFFAOYSA-M^Y InChI=1/Cu.FH/h;1H/q+1;/p-1 Key: BMRUOURRLCCWHB-REWHXWOFAQ
SMILES F[Cu] [Cu]F
Properties
Chemical formula	CuF
Molar mass	82.544 g·mol^−1
Density	7.1 g cm^−3
Structure
Crystal structure	sphalerite
Hazards
GHS pictograms
GHS Signal word	Warning
NFPA 704 (fire diamond)	0 3 0
NIOSH (US health exposure limits):
PEL (Permissible)	TWA 1 mg/m^3 (as Cu)[2]
REL (Recommended)	TWA 1 mg/m^3 (as Cu)[2]
IDLH (Immediate danger)	TWA 100 mg/m^3 (as Cu)[2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is ^YN ?)
Infobox references

Synthesis and reactivity

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]

2CuF → Cu + CuF₂

See also

• Copper(II) fluoride, the other simple fluoride of copper

References

1. "Copper Monofluoride - PubChem Public Chemical Database". The PubChem Project. USA: National Center for Biotechnology Information.
2. NIOSH Pocket Guide to Chemical Hazards. "#0150". National Institute for Occupational Safety and Health (NIOSH).
3. Ebert, F.; Woitinek, H. (1933). "Kristallstrukturen von Fluoriden. II. HgF, HgF₂, CuF und CuF₂". Z. anorg. allg. Chem. 210 (3): 269–272. doi:10.1002/zaac.19332100307.
4. Housecroft, C. E.; Sharpe, A. G. (2008). Inorganic Chemistry (3rd ed.). Prentice Hall. pp. 737–738. ISBN 978-0-13-175553-6.
5. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. pp. 1183–1185. ISBN 978-0-08-037941-8.
6. Gulliver, D. J.; Levason, W.; Webster, M. (1981). "Coordination Stabilised Copper(I) Fluoride. Crystal and Molecular Structure of Fluorotris(triphenylphosphine)copper(I)·Ethanol (1/2), Cu(PPh₃)₃F·2EtOH". Inorg. Chim. Acta. 52: 153–159. doi:10.1016/S0020-1693(00)88590-4.
7. Francis, Simon G.; Matthews, Steven L.; Poleshchuk, Oleg Kh; Walker, Nicholas R.; Legon, Anthony C. (2006-09-25). "N2-Cu-F: A Complex of Dinitrogen and Cuprous Fluoride Characterized by Rotational Spectroscopy". Angewandte Chemie. 118 (38): 6489–6491. doi:10.1002/ange.200601988.