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

1 Answer
Jan 12, 2015

Answer:

The most stable alkene is 1-methylcyclohexene.

Explanation:

The structures of the three compounds are

upload.wikimedia.org

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

Structure 1 is trisubstituted. The substituents are #"CH"_3, "C-3"#, and #"C-6"#.

Structure 2 is disubstituted. The substituents are #"C-1"# and #"C-4"#.

Structure 3 is disubstituted. The substituents are #"C-2"# and #"C-5"#.
.

So the most stable alkene is Structure 1: 1-methylcyclohexene.