[amcavoy]

In considering relative stability of alkenes, my understanding is that

1. More-substituted alkenes are more stable than less-substituted alkenes,
2. Trans alkenes are more stable than cis alkenes, and
3. Conjugated alkenes are more stable than isolated alkenes.

Given this information, I would say that (in terms of stability), we have

trans-2,5-dimethyl-3-hexene > 2,3-dimethyl-2-hexene > 3-ethyl-3-hexene > 3-methyl-1-heptene.

However, the correct order is

2,3-dimethyl-2-hexene > 3-ethyl-3-hexene > trans-2,5-dimethyl-3-hexene > 3-methyl-1-heptene.

Why is this so?

Thank you.

[amcavoy]

Oops, sorry for posting this, I figured it out.  I was looking at the wrong carbon atoms to determine the number of substituents.

Thanks