Hypercojugation is also known as :
No bond resonance
conjugation
resonance
All of these
As we have learned
Hyperconjugation or σ-π resonance or Baker and Nathan effect -
The conjugation between sigma bond and adjacent multiple bond or carbocation is called Hyperconjugation.
- wherein
It is permanent effect.
Definition of hyperconjugation
Hyperconjugation-The delocalization of sigma electrons(usually C-H & C-C)into the adjacent pi orbital or empty or partially filled p orbital.Example hyperconjugation in propene.
Since there is no definite bond between carbon atom & one of the hydrogen atoms in the hyperconjugation forms,hyperconjugation is also called no-bond resonance.
Therefore, option (4) is correct.