The interconversion of haloalkane congeners by halide exchange (Finkelstein halide interchange) is a synthetically useful procedure when applied to primary and, to a lesser degree, secondary alkyl halides. Most frequently these interchanges involve the replacement of chloride or bromide with iodide, occur by an sN2 mechanism, 2 and are usually accomplished by treating the alkyl halide with sodium iodide in an appropriate ...
