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Unformatted text preview: Cl 2-21-97-118 Br 2 +42-93-51 I 2 +113-71 +42 h υ or Δ Chlorination vs. Bromination (15.6) • Chlorination is faster than bromination • Chlorination is less selective than bromination • In fact, bromination often leads to a single product. Chlorination of Propane: First Propagation Step is Exothermic less stable 1º radical more stable 2º radical Bromination of Propane: First Propagation Step is Endothermic less stable 1º radical more stable 2º radical Halogenation in Organic Synthesis (15.7) • Bromination generally more useful than chlorination, due to greater selectivity • Chlorination is useful in cases where only one kind of H is present....
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- Spring '11
- Organic chemistry, Chemical reaction, Radical substitution, Ionic Mechanism