We are exploring the use of the carbon–hydrogen bond as a functional group in efficient free radical chain reactions with fluorinated alkenes, 5 eg formation of 1 and 2 from cyclohexane,‡ and have begun to explore the chemistry of the resultant fluorinated adducts. It has been demonstrated that stereospecific elimination of hydrogen fluoride 5 from 1 and 2 leads to unsaturated derivatives 3 and 4 respectively. We now find that alkene derivatives ...