Question

Which of the following best define the term hyper conjugation?

• A. Transfer of $H$ from $a\, \sigma_{ C - H }$ bond to the $\pi$ system
• B. Participation of an $H$-atom on terminal carbon in the electron sharing
• C. Delocalisation of electron density from a properly oriented $\sigma$-bond into $\pi$-system
• D. Interaction between a properly aligned lone electron pair with the empty $\pi$-system

Answer 1

Answer: (C)

Hyperconjugation involve delocalisation of $\sigma$-electrons with adjacent $\pi$-system.