Perfluoroalkyl derivatives of sulphur. Part XI. The reaction of polyfluoromonoiodoalkanes with dimethyl disulphide

Photochemical reaction of a series of polyfluoromonoiodoalkanes with dimethyl disulphide gives high yields (80–93%) of the corresponding methyl polyfluoroalkyl sulphides together with lower yields (5–17%) of the corresponding H-polyfluoroalkanes. Thermal reaction of heptafluoro-1-iodopropane with dimethyl disulphide gives methyl heptafluoro-n-propyl sulphide (31%) and 1H-heptafluoropropane (61%). The results are interpreted in terms of a free-radical mechanism.