Polyfluoroalkyl compounds of silicon. Part X. Further silanes containing the bis(trifluoromethyl)amino-group

Abstract

The silanes [(CF₃)₂N]₂C:CH·SiX₃(X₃= Me₃ or MeCl₂) have been prepared by free-radical reaction of the corresponding silanes with 1,1-di[bis(trifluoromethyl)amino]ethylene. The reaction of NN-bis(trifluoromethyl)prop-2-enylamine with trimethylsilane or dichloro(methyl)silane in the presence of hexachloroplatinic(IV) acid as catalyst gives the corresponding 1 : 1 compounds (CF₃)₂N·CH₂·CH₂·CH₂·SiX₃(X₃= Me₃ or MeCl₂) in high yield; a similar reaction between NN-bis(trifluoromethyl)vinylamine and dichloro(methyl)silane gives {2-[NN-bis(trifluoromethyl)amino]ethyl}dichloro(methyl)silane. A relatively high molecular-weight polysiloxane {(CF₃)₂N·CH₂·CH₂·SiMe·O}_n has been prepared from {2-[NN-bis(trifluoromethyl)amino]ethyl}dichloro(methyl)silane via the cyclic trislioxane {(CF₃)₂N·CH₂·CH₂·SiMe·O}₃.