Free Radical Additions Involving Fluorine Compounds. IV. The Addition of Dibromodifluoromethane to Some Fluoroölefins¹

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 Preparation of 3-Bromo-3, 3-difluoropropene (25) The adduct from dibromodifluoromethane and ethylene (357 g, 1. 5 moles) was placed in a 3 neck flask with addition funnel, fractionating column head connected to cold traps, and stirrer.…”

Fluorinated cotelomers based on vinylidene fluoride (VDF) and hexafluoropropene (HFP): Synthesis, dehydrofluorination and grafting by amine containing an aromatic ring

“…The telomerization of vinylidene fluoride has been extensively investigated [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Perfluoroalkyl iodides or a,v-diiodoperfluoroalkanes act as efficient chain transfer agents (CTA), since they easily undergo CF 2 -I bond cleavage [5,6,9,11,12,14,15,[20][21][22] leading to low molecular weight molecules.…”

The Synthesis of Special Fluorine-Containing Monomers

“…Since all of the mono-and di-alkyl derivatives of perfluorocyclobutene substituted at the vinyl positions by CH 3 …”

“…Ultraviolet spectroscopy gave similar absorptions, so~it was not possible to identify the two products. Tarrant 3 had assigned the structure of the product of this reaction as solely (A), because dehydroiodination gave CF^lCFClCr^CF^ in 7y% yield. However, dehydroiodination of both products gave this same product.…”