Abstract Tetrachlorodiborane (4) reacts with trifluoroethylene to give dichloro-2, 2- difluorovinylborane and both isomers of dichloro-2-chloro-2-fluorovinylborane. These compounds can be converted to the corresponding difluoro (halovinyl) boranes by treatment with SbF 3. Reaction of B 2 Cl 4 with vinyl fluoride gives 1, 1, 2-tris (dichloroboryl) ethane. A facile halogen exchange with B 2 Cl 4, was observed for a number of fluoroolefins, ...
