On reaction with acid, 4-pyrone is protonated on the carbonyl-group oxygen to give a stable cationic product.

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On reaction with acid, 4-pyrone is protonated on the carbonyl-group oxygen to give a stable cationic product. Using resonance structures and the Hückel 4n + 2 rule, explain why the protonated product is sostable.

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Organic Chemistry

ISBN: 9780495112587

7 Edition

Authors: John McMurry

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Question Posted: Mar 08, 2011 04:12 AM

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On reaction with acid, 4-pyrone is protonated on the carbonyl-group oxygen to give a stable cationic product.

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:0: :0: H* 4-Pyrone :o: :o:

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666666 Protonation of 4pyrone gives structure A whic...View the full answer

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