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

Conjugation Chemistry

Organic Chemistry

16. Conjugated Systems

Conjugation Chemistry

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Multiple Choice

Which statement about conjugation is false?

Conjugation involves the overlap of p orbitals across adjacent atoms.

Conjugation can stabilize a molecule by lowering its overall energy.

Conjugation increases the energy of the molecule.

Conjugation results in the delocalization of electrons.

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Verified step by step guidance

Understand the concept of conjugation: Conjugation in organic chemistry refers to the overlap of p orbitals across adjacent atoms, allowing for the delocalization of electrons. This is a key feature in stabilizing molecules.

Analyze the effects of conjugation: Conjugation typically stabilizes a molecule by lowering its overall energy. This occurs because the delocalization of electrons allows for a more even distribution of electron density, reducing potential energy.

Evaluate the statements: Review each statement provided in the problem. The first statement correctly describes conjugation as involving the overlap of p orbitals. The second statement correctly notes that conjugation can stabilize a molecule by lowering its energy.

Identify the false statement: The statement 'Conjugation increases the energy of the molecule' is false. Conjugation generally decreases the energy of a molecule due to electron delocalization, which stabilizes the molecule.

Confirm the correct understanding: The last statement correctly describes conjugation as resulting in the delocalization of electrons, which is a fundamental aspect of how conjugation stabilizes molecules.