Cobalt trifluoride and metal tetrafluorocobaltates

Laboratory-scale fluorinations with cobalt trifluoride most commonly utilise the technique pioneered by Fowler and his co-workers [80] whereby cobalt trifluoride is formed. 

Formation of perfluorinated ethers by cobalt trifluoride is generally a low-yielding process, because of fragmentation and partial fluorination. However, incorporation into the substrate of electron-withdrawing polyfluoroalkyl groups moderates the fluorination and allows high yields to be obtained [78]. 

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