Which is the most stable alkene?
3,5-diimethyl-3-hexene
2,3,4-trimethyl-3-hexene
3,4,5-trimethyl-2-hexene
2,4,5-trimethyl-1-hexene
2,3,5-trimethyl-3-hexene
The concept in this question is that, the more the alkene is substituted the more stable it is. So when all the four hydrogen is substituted by a R or hydrocarbon group, more stable it is.
Here in this question, only in option 2, all the H is replaced by R group. Hence 2,3,4-trimethyl-3-hexene is the most stable of all.
Please find the attached image for more understanding.
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