Free Radical Halogenation

[Schwann]

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For free radical halogenation, is the main product formed the one that forms the most stable radical intermediate? Is there a difference between using Br2 or Cl2? Thanks.

 

[161927]

For free radical halogenation, is the main product formed the one that forms the most stable radical intermediate? Is there a difference between using Br2 or Cl2? Thanks.

yes and yes!

 

[Epo83]

Isn't Cl2 usually more stable than Br2?

 

[Schwann]

but do we have to take into account the selectivity of using br2 or cl2, or just know that the more stable carbocation is the major product. TPR made a distinct difference in major product when using cl2 and br2 due to the reactivities.