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

16. Conjugated Systems

Pericyclic Reaction

Organic Chemistry

16. Conjugated Systems

Pericyclic Reaction

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Multiple Choice

Identify the type of following pericyclic reaction.

Cycloadditions

Electrocyclic

Sigmatropic shift

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Verified step by step guidance

Examine the chemical structures provided in the image. The left structure is a bicyclic compound, and the right structure is a different bicyclic compound. The reaction involves a change in the connectivity of atoms within the bicyclic framework.

Note the presence of 'hv' above the reaction arrow, indicating that this reaction is photochemically driven. This is a key detail that can help identify the type of pericyclic reaction.

Understand the types of pericyclic reactions: Cycloadditions involve the formation of a cyclic product from acyclic precursors, electrocyclic reactions involve the opening or closing of a ring, and sigmatropic shifts involve the migration of a sigma bond across a pi system.

Consider the transformation shown: The reaction involves a change in the connectivity of the bicyclic structure without the addition of new atoms or the formation of a new ring. This suggests a rearrangement within the existing framework.

Based on the structural change and the photochemical condition, identify the reaction as an electrocyclic reaction, which involves the opening or closing of a ring system under thermal or photochemical conditions.