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Question

Question: Which is the correct order for heat of hydrogenation ?...

Which is the correct order for heat of hydrogenation ?

A

Hept-1-ene < Hept-3-ene < 2-Methylhex-2-ene

B

3-Methylcyclooctene < 1-Methylcyclooctene

< 1,2-Dimethylcyclooctene

C

3-Ethyloct-1-ene < 2-Ethyloct-1-ene < Oct-2-ene

D

Ethene<ethyne

Answer

Ethene<ethyne

Explanation

Solution

Heat of hydrogenation

α1Stabilityofalkeneorcrowdingacrossπbond\alpha\frac{1}{Stabilityofalkeneorcrowdingacross\pi bond}