Vinylic halide
= Vinylic halide
A <vinylic halide> has a halogen atom bonded directly to a carbon of a carbon-carbon <double bond>. <Vinyl chloride> is the simplest common example.
Ordinary substitution at a saturated carbon cannot be transferred unchanged to this geometry and bonding. The distinction between a <vinylic halide> and an <allylic halide> is therefore mechanistically useful, even when both molecules contain an alkene and a halogen.