Question
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 $4 n+2$ rule, explain why the protonated product is so stable.
Step 1
First, let's draw the structure of Show more…
Show all steps
Your feedback will help us improve your experience
Mercedes Mazza and 92 other Chemistry 101 educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Acid-catalyzed bromination of 2-pentanone ($\mathrm{CH}_3\mathrm{COCH}_2\mathrm{CH}_2\mathrm{CH}_3$) forms two products: $\mathrm{BrCH}_2\mathrm{COCH}_2\mathrm{CH}_2\mathrm{CH}_3$ ($\textbf{A}$) and $\mathrm{CH}_3\mathrm{COCH(Br)CH}_2\mathrm{CH}_3$ ($\textbf{B}$). Explain why the major product is $\textbf{B}$, with the Br atom on the more substituted side of the carbonyl group.
Dimethyl butynedioate undergoes a Diels-Alder reaction with $(2 E, 4 E)$ hexadiene. Show the structure and stereochemistry of the product. (FIGURE CANT COPY)
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD