Gerald Alphonse Gornowicz

Study of the alkylation of chlorosilanes. Part I. Synthesis of tetra(1H, 1H, 2H, 2H-polyfluoroalkyl)silanes

Abstract The synthesis and structural characterization of tetra(1 H , 1 H , 2 H , 2 H -polyfluoroalkyl)silaneswith the same or different chain lengths C n F 2 n +1 linked to Si (1⩽ n ⩽6) is reported. When the synthesis was effected from chlorosilanes and fluorinated organomagnesiumor organolithium reagents, the trialkylsilanes were obtained. The last fluorinated chainwas introduced either via a fluoroalkyllithium reagent or by hydrosilylation of thetrialkylsilanes. Some properties and characterization by 1 H, 19 F and 29 Si NMR spectroscopy of the1 H , 1 H , 2 H , 2 H -polyfluoroalkylsilanes are described.

Synthesis and characterization of fluorinated telomers from vinylidene fluoride, hexafluoropropene and chlorotrifluoroethylene

Abstract The synthesis of fluorinated telomers was achieved by radical telomerization of fluorinated monomers (hexafluoropropene, vinylidene fluoride and chlorotrifluoroethylene) with perfluoroalkyl iodide as telogen, as follows: The method of initiation (redox, radical, photochemical or thermal) of these reactions, the average molecular weight of the telomers obtained, and the reactivity of the different telogens (branched or linear) with the monomers are discussed. All telomers obtained were carefully characterized by 19 F NMR.