Draw the structural formulae of a-hydroxyketone and a-hydroxyaldehyde showing keto-enol tautomersim as follows:
Tautomer is the constitutional isomer that differ in the location of a hydrogen atom and a double a double bond.
A carboxyl compound that has a hydrogen on a-carbon is in equilibrium with its enol isomer as follows:
Keto-enol isomers are differing in the location of a hydrogen and a double bond. This type of isomerism is called keto-enol tautomerism.
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