The heat of hydrogenation of an alkene is inversely proportional to its thermodynamic stability. Whi — Hydrocarbons Chemistry Question
Question
The heat of hydrogenation of an alkene is inversely proportional to its thermodynamic stability. Which of the following will release the LEAST heat per mole upon hydrogenation?
Answer: A
💡 Solution & Explanation
2,3-dimethyl-2-butene is a tetrasubstituted alkene, maximizing hyperconjugation ($12 \alpha$ -hydrogens). Being the most stable, it sits at the lowest potential energy and thus releases the least heat upon hydrogenation.
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