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Using curved arrows show how the intermediate formed in this reaction (Hexaphenylbenzene is prepared through a...

Using curved arrows show how the intermediate formed in this reaction (Hexaphenylbenzene is prepared through a Diels-Alder reaction by heating tetraphenylcyclopentadienone and diphenylacetylene in a high boiling solvent such as silicon oil or benzophenone) is produced via the Diels-Alder reaction
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