Question

The higher stabilities of tert-butyl cation over isopropyl cation, and trans-2-butene over propene, respectively, are due to orbital interactions involving

(A) σ→π and σ→π*

(B) σ → vacant p and π → π*

(C) σ→σ* and σ→π

(D) σ → vacant p and σ → π*

Answer 1

Correct option (D) σ → vacant p and σ → π*

Explanation:

In t – butyl cation hyper conjugation takes place due to σ-P conjugation and in trans-2-butene hyper conjugation takes place between σ & π∗ orbitals.