Question

Hyperconjugation involves delocalisation of ___________



i) electrons of carbon-hydrogen σ bond of an alkyl group directly attached to an atom of unsaturated system.

(ii) electrons of carbon-hydrogen σ bond of alkyl group directly attached to the positively charged carbon atom.

(iii) π-electrons of carbon-carbon bond

(iv) lone pair of electrons

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Answer 1

Answer:

Hyperconjugation is the delocalisation of sigma electron also known as sigma-pi conjugation. Presence of α-H with respect to double bond, triple bond or carbon containing positive charge (in carbonium ion) or umpaired electron (in free radical) is a condition for hyperconjugation.