Question

Hyperconjugation effect involves:

• A. Delocalization of lone pair into an adjacent $\pi$- bond
• B. Delocalization of $\pi$ electrons into an adjacent double bond,
• C. Delocalization of $\sigma$ electrons into an adjacent $\pi$ bond,
• D. All are true

Answer 1

Answer: (C)

Delocalization of $\sigma$ electrons into an adjacent $\pi$ bond,

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