Substrate: 3-methylbutane (isopentane).
Reaction: Radical bromination with Br₂ / hν (highly selective for the most substituted radical).
-
Major product: bromination at the tertiary carbon → 2-bromo-2-methylbutane (tert-amyl bromide).
-
Minor product: bromination at the secondary carbon → 2-bromo-3-methylbutane.