Question

The most stable alkene is
(1) CH=CH-CH2-CHE
(2) CH=C-CH=CH2
|
CH3
(3) CH2=CH-CH=CH2
(4) CH3-CH=CH-CH3​

Answer 1

Answer: 2

Explanation:

Option 1, it has 2 hyperconjugated structures

Option 3, it has conjugation (alternative double bonds and single bonds)

Option 4, it has 6 hyperconjugated structures

Option 2, it has 3 hyperconjugated structures + conjugation + saytzeff rule (more substituted alkene is more stable )

In option 1, 3, 4, only 1 factor is giving them stability

In option 2, more factors are acting in giving stability

Therefore option 2 is the most stable alkene out of the given 4 options