Question

Hyperconjugation involves overlap of which of the following orbitals?

• A. $\sigma -\sigma$
• B. $\sigma -p$
• C. $p-p$
• D. $\pi -\pi$

Answer 1

The correct option is B $\sigma -p$

Hyperconjugation involves overlap of the $\sigma -p$ orbitals.

Hyperconjugation is also called no-bond resonance or $\sigma -\pi$ conjugation.

Alkyl groups with at least one $\alpha$ H atom attached with an unsaturated C-atom is able to release electrons in electromeric effect (delocalization).

Hence the correct option is B.