Question

But -1-ene, cis but -2-ene,trans but -2-ene which is maximum stable

Answer 1

Answer:

but-2-ene is most stable.

Explanation:

Usually for acyclic systems trans isomers are more stable than cis isomers. This is typically due to the increased unfavorable steric interaction of the substituents in the cis isomer. Therefore, trans isomers have a less-exothermic heat of combustion, indicating higher thermochemical stability