Chain Initiation Reaction : A free radical reaction mechanism step that has no radical reactant (s) and give radical product (s). In chemistry, initiation is a chemical reaction that triggers one or more secondary reactions. Often the initiation reaction generates a reactive intermediate from a stable molecule which is then involved in secondary reactions. In polymerisation, initiation is followed by a chain reaction and termination.
- (en) Initiation Definitie volgens IUPAC Gold book.