|  | Chapter 10: Conjugation in Alkadienes and Allylic Systems |  | 
Addition of Halogens to Dienes
Like the addition of hydrogen halides to conjugated dienes, halogens add to dienes via direct and conjugate addition pathways:

The major products are usually the more stable, conjugate 
  addition products with the more stable E configuration of C=C. 
  
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|  | © Dr. Ian Hunt, Department of Chemistry |  |