Julian A Cooper This work describes the functionalisation of carbon-hydrogen bonds in saturated hydrocarbons via free radical addition to fluorinated alkenes. For example, hexafluoropropene can be added to produce a mono-adduct:- A range of fluoroalkenes have been used. These adducts can be functionalised by elimination of hydrogen fluoride to give new fluoroalkenes whose chemistry has been investigated. This has resulted in new fluorinated building blocks.