Polyfluoroalkyl compounds of silicon. Part IX. Silanes containing the bis(trifluoromethyl)amino-group

Abstract

The silanes (CF₃)₂N·CH₂·SiX₃(X₃= Me₃, Cl₃, or MeCl₂) have been prepared by free-radical addition of the corresponding silanes to NN-bis(trifluoromethyl)vinylamine. The polymer [(CF₃)₂N·CH₂CH₂·Si·O_1·5]_n and cyclic and linear siloxane polymers [(CF₃)₂N·CH₂·CH₂·SiMe·O]_n have been prepared and their thermal and hydrolytic stabilities compared with those of the model compounds (CF₃)₂N·CH₂·CH₂·SiMe₃ and (CF₃)₂N·CH₂·CH₂·SiF₃. NN-Bis (trifluoromethyl)-2-bromoethane did not react with magnesium or lithium to give the corresponding metal derivatives. The reaction between mercury(II) bis(trifluoromethyl)amide and iodomethyltrimethylsilane gave perfluoro-(2-azapropene), its dimer perfluoro-(4-methyl-2,4-diazapent-2-ene) and, unexpectedly, fluoromethyl-trimethylsilane, and ethylfluorodimethylsilane.