Free Radical Additions Involving Fluorine Compounds. I. The Addition of Dibromodifluoromethane to Hydrocarbon Olefins

Development of Fluoro-Silicone Elastomers

“…For example, dibromodifluoromethane reacted with propylene to form CFZBrCHzCHBrCH 3 and with CHZ:CFCH 3 to give CF 2 BrCH 2 CFBrCH 3 but it did not form a simple addition product with chlorotrifluoroethylene (24,25). Similar results have been described using CF 2 BrCFCIBr and CF 2 ClCFCII (23t 26).…”

“…The olefins selected for the study were propene, 2-methylpropene and butene-2 because they have been found to take part readily in free-radical catalyzed reactions (24). However, it was found that neither silane reacted with propene to give an addition product when heated to 850 for four hours in the presence of benzoyl peroxide in a stainless steel reacticl; vessel.…”

gem-(Difluoroallyl)lithium: Preparation by lithium-halogen exchange and utilization in organosilicon and organic synthesis

“…5 n 25D 1.4450), was collected at 61-67 0 C, 97 Torr (literature bp = 62C, 86 Torr). 5 The yield was 36.7 g (154 mmol, When n-butyllithium was used to generate gem-difluoroallyllithium instead of ethyllithium the yield of Me 3 SiCF 2 -CH=CH 2 was higher (89% by GLC), but the product proved to be difficult to separate by distillation from the n-butyl bromide formed in the lithium/halogen exchange reaction. 1 ". "…”

Radical Copolymerization of Vinylidene Fluoride with 8‐Bromo‐1H,1H,2H‐perfluorooct‐1‐ene: Microstructure, Crosslinking and Thermal Properties

“…[22,[29][30][31][32][33] Among them, 4-bromo-1,1,2-trifluorobut-1-ene (F 2 C --CF -CH 2 -CH 2 -Br) and 4-bromo-1,1-difluorobut-1-ene (F 2 C --CH -CH 2 -CH 2 -Br) are interesting monomers since they exhibit a fluorinated double bond, which exhibits a satisfactory reactivity in radical copolymerization with VDF. Furthermore, the literature shows that a few copolymerizations of these halogenated monomers with VDF have been studied, although Dupont Dow Elastomers [34] claimed a tetrapolymerization of various fluoroolefins with 4-bromo-3, 3,4,4-tetrafluorobut-1-ene.…”