Substitution
In a substitution reaction an atom or group of atoms in a molecule is replaced by a different atom or group.
In free radical substitution, alkanes react with chlorine or bromine in ultraviolet light and a hydrogen atom is replaced by a halogen atom, for example CH4 + Cl2 → CH3Cl + HCl.

Sign in free to see the rest of this lesson, the R.E.C.I.P.E. recall steps and the quiz
BrainCake is free. Make an account in seconds and pick up where this page stops.
More in Reactions and Reactive Species
All 20 lessons in Reactions and Reactive Species · All OCR A-level Organic Chemistry topics