Concept explainers
Rank the
Interpretation: The given alkenes shown in the ball-and-sticks models are to be ranked in order of increasing stability.
Concept introduction: Stability of alkenes is governed by Zaitsev rule. More substituted alkenes are more stable.
Answer to Problem 24P
The stability order of given alkenes is
Explanation of Solution
According to Zaitsev rule the more substituted or more alkylated alkene is more stable which makes the order of stability as tetra-substituted > tri-substituted > di-substituted > mono-substituted.Trans alkenes are more stable than cis alkenes as there substitutions are attached far from each other which makes them less sterically hindered. In the given question A is trans-disubstitued alkene, B is mono-substituted alkene while C is cis-disubstitued alkene.
Explain how you got molecular structure from the given ball and stick model.
Figure 1
So, A and C are more stable than B.A is more stable than C as A is trans isomer while C is cis isomer. Therefore, stability order of given alkenes is
Figure 2
The stability order of given alkenes is–
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