Question

Hyperconjugation is ?

• A. $\sigma --\pi$ conjugation.
• B. noticed due to delocalisation of $\sigma --\pi$ bonds.
• C. no bond resonance
• D. all of the above.

Answer 1

Answer: (D)

all of the above.

Hyperconjugation involvess conjugation of $\sigma$ electrons of C- H Bond and $\pi$ electrons of multiple bond.
It is noticed due to delocalised of $\sigma$ and $\pi$ bonds. It is also known as no bond resonance.