Electrophilic addition reaction of conjugated dienes that occur at high temperature and/or long reaction times (reversible conditions) are said to be under kinetic control.

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Electrophilic addition reactions of conjugated dienes that occur at high temperature and/or long reaction times (reversible conditions) are said to be under thermodynamic control, not kinetic control. Kinetic control typically dominates at low temperatures and short reaction times, leading to products formed fastest, while thermodynamic control dominates at high temperatures and longer times, favoring the most stable products.

Electrophilic Addition Reaction of Conjugated Dienes That Occur at High