IB Chemistry SL 3.3.3 Radical substitution
IB Chemistry SL 3.3.3 Radical substitution
Practise radical substitution by writing the chain mechanism for alkane halogenation and recognising the exact equations that count as propagation.
How this is tested
- write the initiation step Cl2 -> 2Cl· and the two propagation steps for converting ethane into chloroethane
- deduce one valid termination step by combining radicals such as ·C2H5 and Cl·
- state that ethane reacts with Cl2 under UV light by substitution via a free-radical mechanism