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general organic chemistry module-pg 35,question no.10..the one which is more stable will have the maximum energy relaesed during hydrogenation??

general organic chemistry module-pg 35,question no.10..the one which is more stable will have the maximum energy relaesed during hydrogenation??

Grade:12

1 Answers

Suraj Prasad IIT Patna
askIITians Faculty 286 Points
9 years ago
The stability of alkene can be determined by measuring the amount of energy associated with the hydrogenation of the molecule. Since the double bond is breaking in this reaction, the energy released in hydrogenation is proportional to the energy in the double bond of the molecule. This is a useful tool because heats of hydrogenation can be measured very accurately. Stability is simply a measure of energy. Lower energy molecules are more stable than higher energy molecules. More substituted alkenes are more stable than less substituted ones due to hyperconjugation. They have a lower heat of hydrogenation.

Option A here is most substituted thats so least stable and high hydrogenation energy.

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