Wm. Fu et al., BASE INITIATED HALOGEN-EXCHANGE REACTIONS BETWEEN PERHALOALKANES, Science in China. Series B, Chemistry, life sciences & earth sciences, 40(5), 1997, pp. 475-484
Halophilic attacks on CX bonds (X = Pr, Cl) by a base can easily initi
ate intermolecular bromine-chlorine exchange reactions either among br
omine-or chlorine-containing perhaloalkane molecules of different comp
ounds or among molecules of the same compound. It provides a new and c
onvenient method to synthesize perhaloalkanes. Apparently, it pertains
to an anionic mechanism, i.e. the reaction is initiated by halophilic
attack on C-X bonds by the base, and an intermediate carbanion is for
med. Distributions of the products depend on the equilibria involving
all carbanion intermediates and perhaloalkane product molecules.