# Based on Saytzeff's rule, select the most stable alkene: 1-methylcyclohexene, 3-methylcyclohexene or 4-methylcyclohexene?

Jan 12, 2015

The most stable alkene is 1-methylcyclohexene.

#### Explanation:

The structures of the three compounds are

The most stable alkene is the one that is the most highly substituted.

Structure 1 is trisubstituted. The substituents are $\text{CH"_3, "C-3}$, and $\text{C-6}$.

Structure 2 is disubstituted. The substituents are $\text{C-1}$ and $\text{C-4}$.

Structure 3 is disubstituted. The substituents are $\text{C-2}$ and $\text{C-5}$.
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So the most stable alkene is Structure 1: 1-methylcyclohexene.