10. Allylic bromination of 4-methyl-2-pentene could form products J-L. NBS Br Br hv Br K a. Of products J-L, which is more likely to be the major product? Explain. eldiecog lls wsib betas cys ai guim osbi ote pcng noirsnenolsa tonom b. Explain how product M is also possible for this reaction. Br M

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**Title: Allylic Bromination of 4-Methyl-2-pentene**

**Objective:**

Understand the chemical reaction process of allylic bromination using N-bromosuccinimide (NBS) and analyze the potential products.

---

**Experiment Overview:**

**Chemical Reaction:**

4-Methyl-2-pentene, under the influence of UV light (hν) and NBS, produces the brominated products identified as J, K, and L. The structural formulas can be seen as follows:

- **Reactant:**  
  4-Methyl-2-pentene 

- **Reagents:**  
  - NBS
  - UV Light (hν)

**Products:**

- **J:** 
  \[
  \text{Structure: } \text{CH}_3-\text{CH}_2-\text{CH}(\text{CH}_3)-\text{CH}=\text{CHBr}
  \]

- **K:** 
  \[
  \text{Structure: } \text{CH}_3-\text{CH}=\text{CH}-\text{CHBr}-\text{CH}_2-\text{CH}_3
  \]

- **L:**
  \[
  \text{Structure: } \text{CH}_2=\text{C}(\text{CH}_3)-\text{CH}_2-\text{CHBr}-\text{CH}_3
  \]

**Questions for Analysis:**

**a.** Of products J, K, and L, which is more likely to be the major product? Explain.

**b.** Explain how product M is also possible for this reaction.

**Explanation for Product M:**

- **M:** 
  - The structure suggests additional allylic positions available for bromination, potentially leading to alternative arrangements distinct from J, K, and L, indicating rearrangement pathways.

---

**Analysis Expected Outcomes:**

- The students will evaluate which product is favored by considering factors such as stability of intermediates, resonance, and reaction conditions.
- Understand the mechanism of allylic bromination and predict possible major and minor products.
- Analyze how substituents and structure affect the reactivity and configuration of the resulting compounds.

---

Overall, this demonstrates the significance of studying reaction mechanisms and predicting chemical behavior in complex organic reactions.
Transcribed Image Text:**Title: Allylic Bromination of 4-Methyl-2-pentene** **Objective:** Understand the chemical reaction process of allylic bromination using N-bromosuccinimide (NBS) and analyze the potential products. --- **Experiment Overview:** **Chemical Reaction:** 4-Methyl-2-pentene, under the influence of UV light (hν) and NBS, produces the brominated products identified as J, K, and L. The structural formulas can be seen as follows: - **Reactant:** 4-Methyl-2-pentene - **Reagents:** - NBS - UV Light (hν) **Products:** - **J:** \[ \text{Structure: } \text{CH}_3-\text{CH}_2-\text{CH}(\text{CH}_3)-\text{CH}=\text{CHBr} \] - **K:** \[ \text{Structure: } \text{CH}_3-\text{CH}=\text{CH}-\text{CHBr}-\text{CH}_2-\text{CH}_3 \] - **L:** \[ \text{Structure: } \text{CH}_2=\text{C}(\text{CH}_3)-\text{CH}_2-\text{CHBr}-\text{CH}_3 \] **Questions for Analysis:** **a.** Of products J, K, and L, which is more likely to be the major product? Explain. **b.** Explain how product M is also possible for this reaction. **Explanation for Product M:** - **M:** - The structure suggests additional allylic positions available for bromination, potentially leading to alternative arrangements distinct from J, K, and L, indicating rearrangement pathways. --- **Analysis Expected Outcomes:** - The students will evaluate which product is favored by considering factors such as stability of intermediates, resonance, and reaction conditions. - Understand the mechanism of allylic bromination and predict possible major and minor products. - Analyze how substituents and structure affect the reactivity and configuration of the resulting compounds. --- Overall, this demonstrates the significance of studying reaction mechanisms and predicting chemical behavior in complex organic reactions.
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