Silver(III) fluoride

Silver(III) fluoride
Names
	Other names Silver trifluoride
Identifiers
	InChI InChI=1S/Ag.3FH/h;3*1H/q+3;;;/p-3 Key: PGGQSYHSNJQLOQ-UHFFFAOYSA-K;
Properties
Chemical formula	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).
	Infobox references

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.

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.

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References

"Silver Trifluoride: Preparation, Crystal Structure, Some Properties, and Comparison with AuF3". J Am Chem Soc. 113: 4192–4198. 1991. doi:10.1021/ja00011a021.

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