The Hammond Postulate

The Hammond-Postulate more accurately describes what transition states look like. Paraphrased version:

         “Transition states most closely resemble the species with the highest energy”

  • Early transition state = Resembles reagents
  • Late transition state = Resembles products 

Example: Using radical chlorination to explain the Hammond Postulate. 

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Example: Using radical bromination to explain the Hammond Postulate. 

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