Based on hyperconjugation, which of the following isomeric dienes is expected to have the lowest ove — GOC and Organic Chemistry Basics Chemistry Question

💡 Solution & Explanation

The lowest heat of hydrogenation corresponds to the most stable diene. Conjugated dienes (1,3-pentadiene and isoprene) are more stable than isolated (1,4) or cumulated (1,2) dienes. Isoprene is more stable than 1,3-pentadiene because it possesses more $\alpha$ -hydrogens attached to the conjugated system, maximizing hyperconjugative stabilization.