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Organic Chemistry 2 Final - Part 1 of 6
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16. Conjugated Systems / Sigmatropic Rearrangement / Problem 21

A chemist observed that when a certain isomer was heated, the deuterium atom was found to be distributed across all three positions on the five-membered ring. Suggest a plausible mechanism to explain this phenomenon.
Mechanism showing deuterium distribution in a five-membered ring during sigmatropic rearrangement.

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