Perfluoroalkylsilver compounds

Fluorinated olefins, such as chlorotritluoroethylene, hexafluoropropene, per-fluoroisobutylene, and hexafluorocyclobutene, react with silver trifluoroacetate in the presence of alkali metal fluondes to give perfluoroalkylsilver compounds [270] (equation 186)... 

A possible route to secondary perfluoroalkylcopper reagents may be a reaction between a copper(I) halide and a secondary perfluoroalkylsilver compound. The latter are easily prepared by the addition of silver fluoride to a perfluoroolefin in acetonitrile at 25°C 202) [Eq. (26)]. 

Similar to perfluoroalkylsilver compounds perfluorinated alkenylsilver complexes possess a remarkably high thermal stability. The compounds can be obtained by addition of silver fluoride to perfluoroalkynes (equation 15)38 or perfluoroallene (equation 16)39. Compound 15 has been used as precursor for the deposition of silver films by plasma-enhanced chemical vapour deposition40 or thermal MOCVD41. 

The formation of perfluoroalkylsilver compounds via AgF is well known (c/. Vol. 2, p. 345), and the reaction between fluoro-olefins (i-C4Fs, CsF , cyclo-C4F , CF2 CFCl) and silver trifluoroacetate in the presence of KF or CsF avoids many of the problems associated with work with AgF. The compounds are not readily... 

Perfluoroalkylsilver compounds may be readily prepared by the addition of silver fluoride to perfluoro-olefins in acetonitrile, e.g. 

Codeposition of silver vapor with perfluoroalkyl iodides at -196 °C provides an alternative route to nonsolvated primary perfluoroalkylsilvers [272] Phosphine complexes of trifluaromethylsilver are formed from the reaction of trimethyl-phosphme, silver acetate, and bis(trifluoromethyl)cadmium glyme [755] The per-fluoroalkylsilver compounds react with halogens [270], carbon dioxide [274], allyl halides [270, 274], mineral acids and water [275], and nitrosyl chloride [276] to give the expected products Oxidation with dioxygen gives ketones [270] or acyl halides [270] Sulfur reacts via insertion of sulfur into the carbon-silver bond [270] (equation 188)... 

In comparison to the corresponding alkylsilver compounds, the perfluoroalkylsilver derivatives are significantly more stable and are able to participate in chemistry not... 

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