CH2=CH−Cl (Vinyl chloride) and CH2=CH - CH2−Cl (Allyl chloride)
In allyl chloride, chlorine is attached to sp3 carbon atom.
In vinyl chloride, chlorine is attached to sp2 carbon atom. sp2 carbon atom is more electronegative than sp3 carbon atom.
Hence, the bond pair of electrons of C-Cl bond in allyl chloride are less strongly held than that in vinyl chloride and the removal of chlorine is easier in allyl chloride than in vinyl chloride.
Hence, allyl chloride is more reactive than vinyl chloride.
