Hyperconjugation

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Hyperconjugation is best described as:

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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.

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Hyperconjugation

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More hyperconjugation Practice Questions

Hyperconjugation involves orbital overlap between:

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