To develop new synthons for the syntheses of organofluorine compounds, the treatment of Halothane, 2-bromo-2-chloro-1, 1, 1-trifluoroethane,(1) with 4-methylbenzenethiol (2) in the presnce of sodium hydride gave 1-chloro-2, 2, 2-trifluoroethyl 4-methylphenyl sulfide (3), which was oxidized with m-chloroperbenzoic acid (m-CPBA) to the corresponding sulfoxide (4) and sulfone (5). Reaction of 3 and 5 with allyltributyltin in the presence of 2, 2'-azobis ( ...