hyperconjugation

Question

Hyperconjugation is best described as:

RankGuru · Accepted Answer

1. **Definition**: Hyperconjugation is the permanent delocalization of electrons from a $C-H$ $\sigma$ bond of an alkyl group to an adjacent empty $p$-orbital (in carbocations) or a $\pi^*$ orbital (in alkenes).
2. **Alias**: Also called **No-bond resonance** (Baker-Nathan effect).
3. **Physical Requirement**: Needs at least one $H$ atom at the $\alpha$-carbon relative to the double bond or the positively charged center.
4. **Impact**: It increases the stability of the system. More $\alpha$-hydrogens $\implies$ more hyperconjugative structures $\implies$ greater stability.

Rank Guru

hyperconjugation

Select the correct option:

More hyperconjugation Practice Questions

Hyperconjugation involves orbital overlap between: