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Conjugated Hydrohalogenation (1,2 vs 1,4 addition)
16. Conjugated Systems / Conjugated Hydrohalogenation (1,2 vs 1,4 addition) / Problem 5

The following reaction shows that the proximity of the bromide ion to carbon-2 in the transition state is the reason why the 1,2-addition product is formed at a higher rate.
Explain why it was necessary to know that the reaction was performed under kinetically controlled conditions.


Reaction diagram illustrating 1,2 and 1,4 addition products in conjugated hydrohalogenation.

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