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JEE Main Chemistry question

ChemistryOrganic Chemistry - Some Basic Principles and TechniquesJEE Main

The total number of compounds from the given set (six structures, including a triarylmethane-type CH, a vinyl ether, a bridged bicyclic ketone, a symmetrical dibenzyl-type ether, a 1,3-diketone/aryl ketone bearing an α-H, and a bicyclic ketone with an α-H) that exhibit tautomerism is/are .

Answer: 6

Solution

A compound shows keto–enol (or related) tautomerism when it has a C=O (or C=N/C=C-OH-capable) group with at least one adjacent α-hydrogen available for 1,3-shift, or an analogous mobile-proton system (e.g., a

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Question ID VK-150152