Table of contents

1. A Review of General Chemistry5h 5m
2. Molecular Representations1h 14m
3. Acids and Bases2h 46m
4. Alkanes and Cycloalkanes4h 17m
5. Chirality3h 39m
6. Thermodynamics and Kinetics1h 22m
7. Substitution Reactions1h 48m
8. Elimination Reactions2h 30m
9. Alkenes and Alkynes2h 9m
10. Addition Reactions3h 19m
11. Radical Reactions1h 58m
12. Alcohols, Ethers, Epoxides and Thiols2h 42m
13. Alcohols and Carbonyl Compounds2h 17m
14. Synthetic Techniques1h 26m
15. Analytical Techniques:IR, NMR, Mass Spect7h 3m
16. Conjugated Systems6h 13m
17. Ultraviolet Spectroscopy51m
18. Aromaticity2h 34m
19. Reactions of Aromatics: EAS and Beyond5h 1m
20. Phenols55m
21. Aldehydes and Ketones: Nucleophilic Addition4h 56m
22. Carboxylic Acid Derivatives: NAS2h 51m
23. The Chemistry of Thioesters, Phophate Ester and Phosphate Anhydrides1h 10m
24. Enolate Chemistry: Reactions at the Alpha-Carbon1h 53m
25. Condensation Chemistry2h 9m
26. Amines1h 43m
27. Heterocycles2h 0m
28. Carbohydrates5h 53m
29. Amino Acids4h 20m
30. Peptides and Proteins2h 42m
31. Catalysis in Organic Reactions1h 30m
32. Lipids 2h 50m
33. The Organic Chemistry of Metabolic Pathways2h 52m
34. Nucleic Acids1h 32m
35. Transition Metals6h 14m
36. Synthetic Polymers1h 49m

19. Reactions of Aromatics: EAS and Beyond

EAS:Synergistic and Competitive Groups

Organic Chemistry

19. Reactions of Aromatics: EAS and Beyond

EAS:Synergistic and Competitive Groups

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Multiple Choice

Which is NOTa possible product of the reaction?

Possible product structure of brominated aromatic compound.

Another possible product structure of brominated aromatic compound.

Yet another possible product structure of brominated aromatic compound.

All of them are possible products

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Verified step by step guidance

Identify the starting material: The starting material is a benzopyran, which is a bicyclic compound containing a benzene ring fused to a pyran ring.

Recognize the reaction type: The reaction involves bromination using Br₂ in the presence of a catalyst, FeBr₃. This is an electrophilic aromatic substitution reaction.

Determine the possible sites for bromination: The benzene ring in the benzopyran is the site for electrophilic aromatic substitution. The positions ortho and para to the oxygen atom are activated due to resonance, making them more likely sites for bromination.

Consider the directing effects: The oxygen atom in the pyran ring is an electron-donating group, which activates the ortho and para positions on the benzene ring for substitution.

Analyze the products: The images show brominated products at different positions on the benzene ring. All positions shown (ortho, meta, and para) are possible due to the activation by the oxygen atom, although ortho and para are more favored.