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Question


The number of compound(s) which undergo tautomerism to form anti-aromatic compound is/are :

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Solution

Compounds (a), (d) and (f) when undergo tautomerism form compounds which are aromatic as shown :
Compounds (b) and (c) also undergo tautomerism, but they form non-aromatic and anti-aromatic products respectively as shown.

Compound (e) does not have any sp3 hybridised carbon having α-hydrogen, so it does not undergo tautomerism.

So correct answer is 1

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