Which of the following orders is correct for | vedclass

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(A) The heat of hydrogenation ($H$.$O$.$H$.) is inversely proportional to the stability of the alkene. More stable alkenes release less energy upon hy

Vedclass · Accepted Answer

$I > III > II$

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(A) The heat of hydrogenation ($H$.$O$.$H$.) is inversely proportional to the stability of the alkene. More stable alkenes release less energy upon hydrogenation. Comparing the stability: $(II)$ Methylenecyclopropane is relatively less strained compared to the cyclopropene derivatives. $(III)$ $1-$Methylcyclopropene has $5 \alpha-H$ atoms,providing more hyperconjugative stabilization than $(I)$. $(I)$ $3-$Methylcyclopropene has only $1 \alpha-H$ atom,making it the least stable among the three. Thus,the stability order is: $(II) > (III) > (I)$. Therefore,the order of heat of hydrogenation is: $(I) > (III) > (II)$.

Which of the following orders is correct for the heat of hydrogenation of these compounds?

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