Solved: On reaction with acid, 4-pyrone is protonated on the carbonyl-group oxygen to
Chapter 15, Problem 15.42(choose chapter or problem)
On reaction with acid, 4-pyrone is protonated on the carbonyl-group oxygen to give a stable cationic product. Using resonance structures and the Hckel 4n 1 2 rule, explain why the protonated product is so stable.
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