Trifluoromethyl antimony compounds

The derivatives of phenyl trichloromethyl ether, in contrast to their sulfide analogs, are fluorinated to trifluoromethyl compounds only in the presence of the antimony(V) chloride catalyst.82 8(1... 

Kinetically controlled conditions favor the formation of mixed fluorinated compounds if per-halo derivatives are fluorinated with hydrogen fluoride. Therefore, catalysts or coreagents are used to overcome this problem. Thus, selective fluorination of l,3-bis(trichloromethyl)benzene cannot be achieved by hydrogen fluoride using variations in temperature, pressure or time.247 However, if antimony(V) fluoride is added to hydrogen fluoride the reaction produces l-(tri-chloromethyl)-3-(trifluoromethyl)benzene. Selective fluorination can also be performed in compounds with different substitution patterns.247,251 253... 

Majority of known perfluoroalkylated aromatic heterocyclic compounds contain one or several nitrogen atom(s) in the aromatic ring. Examples of fluoroalkylated aromatic six-membered heterocycles containing atoms, such as phosphorous or antimony are extremely rare and this is the reason why this chapter is mostly limited to preparation and chemical transformations of nitrogen-cotitammg aromatic heterocycles, providing limited number of references to only few known examples of trifluoromethyl s-1,3,5,2,4,6-triazatriphosphinines. 

An unusual example where an oxirane ring is actually formed under FVP conditions involves the X -antimony compound 3 which undergoes reductive ehmination upon FVP at 500 °C to give the bis(trifluoromethyl)oxirane... 

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