Among the following pairs,in which case does | vedclass

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(C) The heat of hydrogenation is inversely proportional to the stability of the alkene. For option $A$,cyclobutene is more strained than cyclopentene,

Vedclass · Accepted Answer

Bicyclo[$4.2$.$0$]oct$-1-$ene and bicyclo[$4.2$.$0$]oct$-2-$ene

Vedclass · Answer

(C) The heat of hydrogenation is inversely proportional to the stability of the alkene. For option $A$,cyclobutene is more strained than cyclopentene,so it has a higher heat of hydrogenation. For option $B$,$cis-2-$butene is less stable than $trans-2-$butene due to steric hindrance,so it has a higher heat of hydrogenation. For option $C$,the second compound (bicyclo[$4.2$.$0$]oct$-2-$ene) has a double bond in a smaller,more strained ring (cyclobutene ring) compared to the first compound (bicyclo[$4.2$.$0$]oct$-1-$ene),where the double bond is shared between the rings. Therefore,the second compound has higher ring strain and higher heat of hydrogenation. For option $D$,$1-$butene is less stable than $2-$butene,so it has a higher heat of hydrogenation. Thus,the correct pair where the second compound has a higher heat of hydrogenation is $C$.

Among the following pairs,in which case does the second compound have a higher heat of hydrogenation?

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