Why enol is unstable? [duplicate]








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[Which is the more stable enol form?](/questions/18904/which-is-the-more-stable-enol-form)

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Closed 7 years ago.



Alkynes undergo acid-catalyzed addition of water across the triple bond in the presence of mercuric ion catalyst. The products are enol and keto. I want to know why is keto more stable than enol.




It's is basically because in keto form the C=O bond is more stable than the C=C bond in enol. And the difference is probably close to 12 kcal.


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