Chapter 8.6: Allylic Halogenation

allylic carbon

o Step 1: Chain Initiation  Chain initiation involves formation of radicals from NBS by light-induced hemolytic cleavage of the N—Br bond in NBS o Step 2: Chain Propagation  Chain propagation involves the formation of products. Reaction of a radical and a nonradical gives a new radical. o Step 3: Chain Termination—The Destruction of Radicals  Propagation if the chain reaction continues until termination steps produce nonradical products and this stop further reaction.

allylic substitution

any reaction in which an atom or group of atoms is substituted for another atom or group of atoms at an allylic carbon

a carbon adjacent to a carbon-carbon double bond