Silver(III) fluoride
Silver(III) fluoride, AgF3, is an unstable, bright-red, diamagnetic compound containing silver in the unusual +3 oxidation state. Its crystal structure is very similar to that of gold(III) fluoride: it is a polymer consisting of rectangular AgF4 units linked into chains by fluoro bridges.[1]
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| IUPAC name
Silver(III) fluoride | |
| Other names
Silver trifluoride Argentic fluoride | |
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| Properties | |
| AgF3 | |
| Molar mass | 164.86 g/mol |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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Preparation
AgF3 can be prepared by treating a solution containing tetrafluoroargentate ions in anhydrous hydrogen fluoride with boron trifluoride. In anhydrous-HF solution, it decomposes spontaneously to Ag3F8 overnight at room temperature.
Earlier preparations were more heroic, involving the use of krypton difluoride as fluorinating agent, and tended to produce the mixed-valence Ag3F8.
References
- Zemva, Boris; Lutar, Karel; Jesih, Adolf; Casteel, William J.; Wilkinson, Angus P.; Cox, David E.; von Dreele, Robert B.; Borrmann, Horst; Bartlett, Neil (1991). "Silver Trifluoride: Preparation, Crystal Structure, Some Properties, and Comparison with AuF3". J Am Chem Soc. 113 (11): 4192–4198. doi:10.1021/ja00011a021.
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