Allylic halide
= Allylic halide
An <allylic halide> has a halogen atom bonded to a carbon adjacent to a carbon-carbon <double bond>. The halogen-bearing carbon is not itself one of the two alkene carbons.
The adjacent π system can stabilize developing charge or participate in delocalized intermediates. <Allylic halides> can therefore undergo substitution with patterns different from an otherwise comparable saturated alkyl halide.