Assertion : 2,3-dimethyl but-2-ene is more stable than but-2-ene.
Reason : 2,3-dimethyl but-2-ene possesses 12 `alpha`-hydrogen atoms whereas but-2-ene possesses only 6`alpha`-hydrogen atoms and therefore former shows more pronounced hyperconjugation.

Options

A. If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
B. If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
C. If Assertion is correct , but Reason is incorrect.
D. If both Assertion and Reason are incorrect .

Answer

A

Explanation

The phenomenon of displacement of electrons by conjugative mechanism involving. `sigma`-and `pi`-electron is called hyperconjugation. It is arised when alkyl groups having atleast one H atom on the `alpha`-carbon atom attached to an unsaturated carbon atom are able to release electrons due to delocalisation of `sigma` and `pi`-bond. It is more pronounced if `alpha`-H atom are more in number. Thus, stability of alkenes has been explained in terms of hyper conjugation