Novel fluorinated monomers bearing reactive side groups. Part 1. Preparation and use of ClCF2CFClI as the telogen

Article abstract of DOI:10.1016/0022-1139(95)03277-K

The addition of ICI to chlorotrifluoroethylene leading to a ClCF2CFClI (I)/Cl2CFCF2I (II) mixture is described.Four different ways of initiation (thermal, photochemical, or the presence of redox catalysts or radical initiators) were used in order to get optimized yields and amounts of isomer I.Thermal initiation led to quantitative yields whereas the photochemically induced reaction usually produced the highest proportion of isomer I.Excellent yields of isomer I were obtained at 140 deg C.The batch process was more interesting in both selectivity and yield.The activation energy of the reaction was 27 kJ mol^-1 and elucidation of the mechanism was proposed in terms of a radical process. - Keywords: Chlorotrifluoroethylene; Iodine monochloride; Telomerization; Initiation; Transfer agent; Activation energy