Abstract Hydrofluorocarbons (HFCs) have been fluorinated via the high-valency metal fluoridesCoF 3, MnF 3 and KCoF 4. The fluorinating powers of these reagents for the monofluorinationof 2, 2-difluoropropane are in the order CoF 3> MnF 3> KCoF 4. The fluorinations of fluorinatedethanes with CoF 3 have been examined in detail. The effects of temperature andthe distribution of products are described. Furthermore, regioselective ...