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

3. Acids and Bases

Organic Chemistry Reactions

Organic Chemistry

3. Acids and Bases

Organic Chemistry Reactions

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Multiple Choice

Which statement about the reaction mechanism of nucleophilic substitution is correct?

In SN2 reactions, the nucleophile attacks the substrate after the leaving group has departed.

SN2 reactions are characterized by a two-step mechanism.

SN1 reactions typically occur with primary substrates.

In SN1 reactions, the rate-determining step involves the formation of a carbocation intermediate.

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Verified step by step guidance

Understand the difference between SN1 and SN2 reactions: SN1 reactions involve a two-step mechanism where the first step is the formation of a carbocation intermediate, while SN2 reactions involve a one-step mechanism where the nucleophile attacks the substrate simultaneously as the leaving group departs.

Analyze the statement about SN2 reactions: In SN2 reactions, the nucleophile attacks the substrate at the same time as the leaving group departs, not after. This is a concerted mechanism, meaning it occurs in a single step.

Evaluate the statement about SN2 reactions being two-step: SN2 reactions are characterized by a one-step mechanism, not two-step. The nucleophile attacks the substrate directly, leading to the inversion of configuration at the carbon center.

Consider the statement about SN1 reactions with primary substrates: SN1 reactions typically occur with tertiary substrates, not primary, because tertiary carbocations are more stable than primary ones.

Identify the correct statement about SN1 reactions: The rate-determining step in SN1 reactions is the formation of a carbocation intermediate, which is a slow step and determines the overall reaction rate.