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**Title: Allylic Bromination and Product Analysis** --- **Objective:** For each of the following structures, analyze the addition of HBr using allylic bromination principles. --- **Instructions:** A. For each of the following: a. **Predict Products Following HBr Addition:** Determine if the addition results in one or multiple products. b. **Draw Mechanisms:** Illustrate both versions of the allylic cation involved in the reaction. c. **Identify 1,2 vs. 1,4 Addition Products:** Differentiate between products formed at proximal and distal positions relative to the original double bond. d. **Identify Thermodynamic Product:** Specify which product is more stable energetically. --- **Structures to Analyze:** 1. **Structure 1:** - A linear molecule with a single double bond. 2. **Structure 2:** - A branched alkene with two methyl groups adjacent to a double bond. 3. **Structure 3:** - A six-membered ring with alternating double bonds. --- **Instructions for Graphs/Diagrams:** - Use clear arrows to depict electron flow during the reaction mechanisms. - Highlight the formation of the most stable carbocation. - Indicate the positions for 1,2 and 1,4 additions clearly on product structures. - Compare the stability of the generated products to identify the thermodynamic product. --- **Note:** This exercise aims to develop an understanding of electrophilic addition reactions with HBr, specifically focusing on the nuances of allylic and thermodynamic product formation.

**Title: Allylic Bromination and Product Analysis** --- **Objective:** For each of the following structures, analyze the addition of HBr using allylic bromination principles. --- **Instructions:** A. For each of the following: a. **Predict Products Following HBr Addition:** Determine if the addition results in one or multiple products. b. **Draw Mechanisms:** Illustrate both versions of the allylic cation involved in the reaction. c. **Identify 1,2 vs. 1,4 Addition Products:** Differentiate between products formed at proximal and distal positions relative to the original double bond. d. **Identify Thermodynamic Product:** Specify which product is more stable energetically. --- **Structures to Analyze:** 1. **Structure 1:** - A linear molecule with a single double bond. 2. **Structure 2:** - A branched alkene with two methyl groups adjacent to a double bond. 3. **Structure 3:** - A six-membered ring with alternating double bonds. --- **Instructions for Graphs/Diagrams:** - Use clear arrows to depict electron flow during the reaction mechanisms. - Highlight the formation of the most stable carbocation. - Indicate the positions for 1,2 and 1,4 additions clearly on product structures. - Compare the stability of the generated products to identify the thermodynamic product. --- **Note:** This exercise aims to develop an understanding of electrophilic addition reactions with HBr, specifically focusing on the nuances of allylic and thermodynamic product formation.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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**Title: Allylic Bromination and Product Analysis** --- **Objective:** For each of the following structures, analyze the addition of HBr using allylic bromination principles. --- **Instructions:** A. For each of the following: a. **Predict Products Following HBr Addition:** Determine if the addition results in one or multiple products. b. **Draw Mechanisms:** Illustrate both versions of the allylic cation involved in the reaction. c. **Identify 1,2 vs. 1,4 Addition Products:** Differentiate between products formed at proximal and distal positions relative to the original double bond. d. **Identify Thermodynamic Product:** Specify which product is more stable energetically. --- **Structures to Analyze:** 1. **Structure 1:** - A linear molecule with a single double bond. 2. **Structure 2:** - A branched alkene with two methyl groups adjacent to a double bond. 3. **Structure 3:** - A six-membered ring with alternating double bonds. --- **Instructions for Graphs/Diagrams:** - Use clear arrows to depict electron flow during the reaction mechanisms. - Highlight the formation of the most stable carbocation. - Indicate the positions for 1,2 and 1,4 additions clearly on product structures. - Compare the stability of the generated products to identify the thermodynamic product. --- **Note:** This exercise aims to develop an understanding of electrophilic addition reactions with HBr, specifically focusing on the nuances of allylic and thermodynamic product formation.
Transcribed Image Text:**Title: Allylic Bromination and Product Analysis** --- **Objective:** For each of the following structures, analyze the addition of HBr using allylic bromination principles. --- **Instructions:** A. For each of the following: a. **Predict Products Following HBr Addition:** Determine if the addition results in one or multiple products. b. **Draw Mechanisms:** Illustrate both versions of the allylic cation involved in the reaction. c. **Identify 1,2 vs. 1,4 Addition Products:** Differentiate between products formed at proximal and distal positions relative to the original double bond. d. **Identify Thermodynamic Product:** Specify which product is more stable energetically. --- **Structures to Analyze:** 1. **Structure 1:** - A linear molecule with a single double bond. 2. **Structure 2:** - A branched alkene with two methyl groups adjacent to a double bond. 3. **Structure 3:** - A six-membered ring with alternating double bonds. --- **Instructions for Graphs/Diagrams:** - Use clear arrows to depict electron flow during the reaction mechanisms. - Highlight the formation of the most stable carbocation. - Indicate the positions for 1,2 and 1,4 additions clearly on product structures. - Compare the stability of the generated products to identify the thermodynamic product. --- **Note:** This exercise aims to develop an understanding of electrophilic addition reactions with HBr, specifically focusing on the nuances of allylic and thermodynamic product formation.
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Given : structure of reactants.

Tip: alkene act as nucleophile and attacks on hbr

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