Silver subfluoride is the
inorganic compound
In chemistry, an inorganic compound is typically a chemical compound that lacks carbon–hydrogen bonds, that is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as '' inorganic chemist ...
with the formula Ag
2F. This is an unusual example of a compound where the
oxidation state of silver is fractional. The compound is produced by the reaction of silver and
silver(I) fluoride:
[Lee Poyer, Maurice Fielder, Hugh Harrison, Burl E. Bryant "Disilver Fluoride: (Silver “Subfluoride”)" Inorganic Syntheses, 1957, Volume 5, 92–94. ]
:Ag + AgF → Ag
2F
It forms small crystals with a bronze reflex and is a good conductor of
electricity. On contact with water almost instant
hydrolysis occurs with the precipitation of
silver (Ag) powder.
Crystal structure
Ag
2F adopts the anti-CdI
2 crystal structure, i.e. the same structure as
cadmium iodide, CdI
2, but with "Ag
½+ " centres in the I
− positions and F
− in the Cd
2+ positions.
The shortest distance between silver atoms is 299.6 pm (compared to 289 pm in the metal).
[Egon Wiberg, Arnold Frederick Holleman (2001) ''Inorganic Chemistry'', Elsevier ]
References
{{DEFAULTSORT:Silver Subfluoride
Metal halides
Fluorides
Silver compounds