Perfluoroalkyl derivatives of sulphur. Part XIV. The reactions of tetrafluoro-1,2-di-iodoethane and octafluoro-1,4-di-iodobutane with dimethyl sulphide and dimethyl disulphide

Abstract

The photochemical reaction of tetrafluoro-1,2-di-iodoethane with dimethyl sulphide gives a high yield of tetrafluoroethylene, whereas reaction with dimethyl disulphide affords 1,2-bis(methylthio)tetrafluoroethane and 1,4-bis-(methylthio)octafluorobutane as major products together with tetrafluoroethylene, methyl 1,1,2,2-tetrafluoroethyl sulphide, methyl tetrafluoro-2-iodoethyl sulphide, perfluorocyclopropane, and difluoromethane. Octafluoro-1,4-di-iodobutane and dimethyl sulphide give 1H-octafluoro-4-iodobutane, methyl octafluoro-4-iodobutyl sulphide, and trimethylsulphonium iodide as the major products with smaller amounts of 1H,4H-octafluoro-butane, 1,4-bis(methylthio)octafluorobutane, and methyl 4H-octafluorobutyl sulphide.