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Question

The kind of delocalisation involving sigma bond orbitals is called ?

A
Hyperconjugation
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B
Mesomerism
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C
Tautomerism
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D
Resonance
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Solution

The correct option is A Hyperconjugation
The kind of delocalization involving sigma bond orbitals is called hyperconjugation.
Hyperconjugation is also known as σπ conjugation. It is observed in alkyl groups with at least one hydrogen atom on the alpha carbon atom attached to an unsaturated carbon atom.

Hence, option A is correct.

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