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Silver fluoride

Silver fluoride
CAS number 7775-41-9
Molecular formula AgF
Molar mass 126.866 g/mol
Appearance yellow-brown solid
Density 5.852 g/cm3, solid
Melting point

435 °C, 708 K, 815 °F

Boiling point

1159 °C, 1432 K, 2118 °F

Solubility in water 1.8 kg/L (20 °C)
Crystal structure cubic
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and references

Silver(I) fluoride (AgF), also known as argentous fluoride and silver monofluoride, is a compound of silver and fluorine. It is a ginger-coloured solid, melting point 435 °C[1], which blackens on exposure to moist air. Unlike other silver halides such as silver chloride it is soluble in water to the extent of 1.8 kg/L[1], and it even has some solubility in acetonitrile. AgF is made from silver(I) carbonate and hydrofluoric acid.

Silver(I) fluoride finds most application in organofluorine chemistry for addition of fluoride across multiple bonds. For example, AgF adds to perfluoroalkenes in acetonitrile to give perfluoroalkylsilver(I) derivatives:[2] RFCF=CF2 + AgF → RFCF(CF3)Ag.

Silver also forms a higher fluoride, silver(II) fluoride.

See also

  • Naming Ionic Compounds


  1. Chemistry of the Elements, NN Greenwood & A Earnshaw, Pergamon Press.
  2. Miller, W. T.; Burnard, R. J., J. Am. Chem. Soc. 1968, 90, 7367-7368.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Silver_fluoride". A list of authors is available in Wikipedia.
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