- This effect is also known as the Baker Nathan effect or the Anchimeric effect or No Bond resonance or σ – π conjugation.
- Whenever there is an alpha – ( C – H ) bond with respect to C = C, C+ , C. , sigma electrons, etc bonds becomes delocalized due to overlapping of sigma orbitals of C – H bond and p – orbitals of C=C , C., C+, and various possible resonating structures are developed which are called hyperconjugation.
- Resonance structure due to hyperconjugation may be written involving ” no bond ” between the alpha carbon and hydrogen atoms. so called ” No bond resonance”
Application of Hyperconjugation
- Explains the stability of alkene.
- Heat of hydrogenation and heat of combustion.
- Stability of alkyl carbocation and alkyl free radical.