tautomerism

Question

Keto-enol tautomerism is shown by:

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**Tautomerism** is a special type of functional isomerism where the isomers exist in dynamic equilibrium.
- **Requirement**: For Keto-Enol tautomerism, the carbonyl compound must have at least one **$\alpha$-hydrogen** (hydrogen on the carbon next to the carbonyl group).
- **Mechanism**: The $\alpha$-hydrogen migrates to the oxygen, and the $C=O$ double bond shifts to $C=C$.
- **Formaldehyde ($HCHO$)** has no $\alpha$-carbon, so it cannot show tautomerism. Acetone and Acetaldehyde have $\alpha$-hydrogens and thus display it.

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tautomerism

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More tautomerism Practice Questions

Keto-enol tautomerism involves migration of: