Explain negative hyperconjugation in detail and also give some examples.
SSK , 3 Years ago
Grade 12
Organic Chemistry> Explain negative hyperconjugation in deta...
1 AnswersVanshika Govindani
Last Activity: 3 Years ago
Negative hyperconjugation is the donation of electron density from a filled pi or p orbital to a neighboring sigma* orbital. It is a type of resonance that can stabilize a molecule or transition state. As it adds electrons to the anti bonding orbital so it causes elongation of the sigma bond.
It is most commonly observed when sigma* is located on the C-F or C-O bonds. It does not occur to the appreciable extent in the C-H bond.
The picture below gives the representation of this effect:
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