# Does resonance overrule hyper conjugation in terms of stability in alkenes? [closed]

Which of the following is more stable ?

1. $\ce{CH2=C(CH3)-CH=CH2}$

2. $\ce{CH3-CH=CH-CH3}$

I was going for answer 2 because it has 6 hyper conjugative effects. I found the answer given to be 1, which has 3 hyper conjugations but more resonance structures. Will the R-effect meet the deficit of 3 hyper conjugations and make 1 more stable than 2?

• I do not understand in which context should the one be more stable than the other. – Martin - マーチン Feb 25 '15 at 7:15
• I dont get you, sorry can you elaborate ? – Dhruba Banerjee Feb 25 '15 at 7:17
• Is it more stable towards hydration, oxidation, bromination, substitution, elimination, heating, pressure, etc, pp.? The context is missing. It is impossible to compare the stability of two molecules without knowing how to relate them. – Martin - マーチン Feb 25 '15 at 7:24
• Overall stability (?) The question asks for stability only. And it is a verified question appeared in public exams in past years. – Dhruba Banerjee Feb 25 '15 at 7:33