Why Allyl Halides Are More Reactive Than Vinyl Halides

Halo alkane and haloarene organic chemistry class 12 compounds.

Why allyl halides are more reactive than vinyl halides.

Pankaj singh chemistry expert explains why aryl halides are less reactive than alkyl halides for nucleophilic substitution. In alkyl halides carbon atom of c x bond is sp3 hybridised while in aryl halides the carbon atom attached to halogen is sp2 hybridised. As is fluoroacetate the toxic agent in the south african shrub dichapetalum cymosum known as gifblaar however the halogen rich environment of the ocean has produced many interesting natural products incorporating large. So it is difficult to break the c x bond.

Halogen containing organic compounds are relatively rare in terrestrial plants and animals. In allyl halides the double bond is in conjugation with lone pair on halides. Aryl halides are less reactive towards nucleophilic substitution reaction due to several reasons. Whereas alkyl halides undergo nucleophilic substitution easily.

The sp2 hybridised carbon atom with greater s character is more electronegative. The resonating structures have negative charge on terminal carbon which is very unstable and hence the allyl halides are highly reactive. Vinyl halides are less reactive than alkyl halides. This is because c x bond in vinyl halides have partial double bond character due to resonance.

Answer here is the answer to the question vinyl halides are less reactive than alkyl halides.