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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

10. Addition Reactions

Hydrohalogenation

Organic Chemistry

10. Addition Reactions

Hydrohalogenation

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Multiple Choice

Which arrow pushing formalism best represents the first step of the hydrohalogenation reaction?

The figure illustrates an arrow-pushing mechanism for a reaction. The reaction contains two reactants. The first reactant has the following structure: A 4-carbon alkene chain is depicted as a line structure using 3 zigzag lines. A double bond is present between C 3 and C 4. The second reactant has the following structure: H, single bond, B r. A curved arrow from H in the second reactant points to C 4 in the first reactant.

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Verified step by step guidance

Identify the reactants involved in the hydrohalogenation reaction. In this case, the reactants are an alkene and hydrogen bromide (H-Br).

Understand the mechanism of hydrohalogenation, which involves the addition of a hydrogen halide across the double bond of an alkene.

Recognize that the first step in the mechanism is the protonation of the alkene. This involves the pi electrons of the double bond attacking the hydrogen atom of H-Br.

Visualize the movement of electrons: the pi bond electrons from the alkene form a bond with the hydrogen atom, resulting in the formation of a carbocation intermediate.

Note that the bond between hydrogen and bromine in H-Br breaks, with the electrons moving to the bromine atom, forming a bromide ion (Br-).