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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

8. Elimination Reactions

Solvents

Organic Chemistry

8. Elimination Reactions

Solvents

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Multiple Choice

Which of the following is the best base to use in an E2 reaction?

H₂O

The figure illustrates the structure of a molecule. A 3-carbon alkane chain is depicted as a line structure using 2 zigzag lines. C 2 is single bonded to C H 3 on the lower left in the form of a line and single bonded to O H on the lower right.

The figure illustrates the structure of a molecule labelled L D A. A 1 N and 4 C heteronuclear alkane chain is depicted as a line structure using 4 zigzag lines. N bound to L i occupies the third position. C 2 is single bonded to C H 3 on the left in the form of a line. C 3 is single bonded to C H 3 on the left in the form of a line.

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Identify the requirements for a base in an E2 reaction. E2 reactions require a strong base to abstract a proton and facilitate the elimination process.

Examine the structures provided: the first image shows tert-butanol, the second image shows lithium diisopropylamide (LDA), and the third image shows isopropanol.

Evaluate the basicity of each compound: tert-butanol and isopropanol are alcohols and are not strong bases. LDA, on the other hand, is a strong, non-nucleophilic base.

Consider the steric hindrance: LDA is a bulky base, which is beneficial in E2 reactions as it favors elimination over substitution.

Conclude that LDA is the best choice for an E2 reaction due to its strong basicity and steric hindrance, which promotes elimination.