TELOMERISATION DU FLUORURE DE VINYLIDENE avec CCl4 et CCl3-R

Article abstract of DOI:10.1016/S0022-1139(00)80451-0

We have studied the telomerization of vinylidene fluoride with carbon tetrachloride, trichloroethanol and methyl trichloroacetate by redox catalysis as well as radical initiation.In all cases, we obtained telomers having the structure : R-CCl2-(CH2-CF2)n-Cl where R=Cl, CH2OH and CO2CH3.The first adducts n=1 to 3 have been isolated in each case and analysed by ¹H, ¹³C and ¹⁹F NMR spectroscopy.We did not observe any reverse addition of the monomer on itself. We have also compared the two types of initiation for the selectivity of structures and the chain lengths.It should be noted that with CCl4 in the presence of deficiency of telogen, (often done to increase the DP_n) we obtain adducts having the structure : Cl-(CF2-CH2)x-CCl2-(CH2-CF2)y-Cl.