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MHT CET Chemistry question

ChemistryOrganic Chemistry - Some Basic Principles and TechniquesMHT CET

The order of stability of the following tautomeric compound is I. \mathrm{CH_2{=}C(OH){-}CH_2{-}C(=O){-}CH_3} II. III. \mathrm{CH_3{-}C(OH){=}CH{-}C(=O){-}CH_3} [MHTCET 2013]

Answer: (B)

Solution

III is the enol of the 1,3-diketone: its C=C is conjugated with C=O and it is stabilised by intramolecular hydrogen bonding, so it is the most stable; II is the

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Question ID VK-079984