This latter compound, which has been neglected, is easily made in almost quantitative yields from commercial trifluorochloroethylene by addition of hydrogen bromide to form CFzBr- CHClF followed by treatment of the adduct with zinc to remove bromine and chlorine from adjacent carbon atoms. Trifluoroethylene reacts with chlorine, bromine or methanol to yield the adducts in almost quantitative fashion. The usual physical properties of these adducts, ...