Page 112 - Pharm.Org.Chem-I 02-06-05-101
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Electrophilic addition to transoid conjugated
dienes
❑ Addition of halogen (Br2 or Cl2)
Proposed Mechanism
The ratio of the 2 products can be controlled by adjusting the temperature:
At -80o C: 1,2-addition product is major
At 40o C : 1,4-addition product is major
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