among the compound, choose the most stable alkene among the following, pent-2-ene, 2-methylbut-2-ene, pent-1-ene

Question

anonymous · Answer

If we draw the structures we can better understand what's happening around each double-bond:

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anonymous · Answer

The stability of an alkene is greater if there are more carbons attached to it--so a secondary alkene--one with two carbons attached--would be more stable than a primary alkene with just one carbon attached to it.

anonymous · Answer

So whichever of the above three structures has the greatest number of carbons attached is the most stable.

Since cis- and trans- orientations were not mentioned in the question, they don't have any effect on our answer.