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Question
The more stable enol form of Butan-2-one is
The more stable enol form of Butan-2-one is
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Solution
The correct option is B
Carbonyl compound in which delocalisation takes place between a >C=O group and an alpha H where the equilibrium lies between a keto form and an enol form is called Keto-enol tautomerism.
The most stable enol is (b) as the double bond is more stable in this form. More substituted alkenes are stable due to hyperconjugation effect. So butan-2-one has this enol in greater proportion than the other two enols. However keto form is more stable than the all enol forms of this compound.
Carbonyl compound in which delocalisation takes place between a >C=O group and an alpha H where the equilibrium lies between a keto form and an enol form is called Keto-enol tautomerism.
The most stable enol is (b) as the double bond is more stable in this form. More substituted alkenes are stable due to hyperconjugation effect. So butan-2-one has this enol in greater proportion than the other two enols. However keto form is more stable than the all enol forms of this compound.
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