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Chemistry LibreTexts

Keto-Enol Tautomerism

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Keto-enol tautomerism is tautomerism involving an aldehyde or a ketone and an enol.

eg. 1:

ketoenoltautomerism1.png

eg. 2:

ketoenoltautomerism2.png

In keto-enol tautomerism, the aldehyde or the ketone is called the keto form and the enol is called the enol form. In most keto-enol tautomerisms, the equilibrium lies by far toward the keto form, indicating that the keto form is usually much more stable than the enol form, which can be attributed to the feet that a carbon-oxygen double bond is significantly stronger than a carbon-carbon double bond.

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This page titled Keto-Enol Tautomerism is shared under a All Rights Reserved (used with permission) license and was authored, remixed, and/or curated by Gamini Gunawardena via source content that was edited to the style and standards of the LibreTexts platform.

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