Question

Hyperconjugation is:

• A. $\sigma -\pi$ conjugation
• B. delocalization of $\sigma$ and $\pi$ bonds
• C. no bond resonance
• D. all of the above

Answer 1

The correct option is D all of the above

Hyperconjugation is the stabilizing interaction that results from the interaction of the electrons in a bond (usually C-H or C-C) with an adjacent empty or partially filled p-orbital or a -orbital to give an extended molecular orbital that increases the stability of the system.

Conjugated system has alternate $\sigma$ and $\pi$ bonds.

Hyperconjugation is a delocalization of $\sigma$ and $\pi$ bonds.

As a result, it ends in addition to bonds where there is no bond between $C$ and $H$.

Therefore, it is also called no bond resonance.

Hence, all the options are correct.