Fig. 2. Investigations of chloro/fluoro-polyhaloalkylation of alkenes. (a) Photo-induced iron mediated chloro-trifluoromethylation of an alkene. (b) Proposed mechanism of photo-induced iron catalyzed chloro/fluoro-polyhaloalkylation of alkenes. (c) Optimal conditions of the chloro/fluoro-polyhaloalkylation of alkenes.