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H2 1. ВНз/THF А B Lindlar 2. ОН, Н202, H2о Br2 A 2 NaNH2 — В CH2CI2

H2 1. ВНз/THF А B Lindlar 2. ОН, Н202, H2о Br2 A 2 NaNH2 — В CH2CI2

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
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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I need help finding the products for each individual portion of these reactions... thanks

### Chemical Reactions and Mechanisms #### Reaction 1: The starting material is a cyclohexene with an alkyne group attached. It undergoes two steps of reactions: 1. **Hydrogenation with Lindlar Catalyst:** - Reagents: \( \text{H}_2, \) Lindlar's Catalyst. - The alkyne is partially hydrogenated to form an alkene, which is denoted as compound A. 2. **Hydroboration-Oxidation:** - Reagents: \( \text{BH}_3/\text{THF, } \) followed by \( \text{OH}^-, \text{H}_2\text{O}_2, \text{H}_2\text{O} \). - The alkene (A) undergoes hydroboration-oxidation to produce an alcohol, noted as compound B. #### Reaction 2: The starting material is an alkyne. 1. **Bromination:** - Reagents: \( \text{Br}_2 \) in \( \text{CH}_2\text{Cl}_2 \). - The alkyne reacts with bromine to form a dibromo-alkane, identified as compound A. 2. **Dehydrohalogenation:** - Reagents: 2 NaNH\(_2\). - The dibromo-alkane (A) is treated with sodium amide, leading to dehydrohalogenation, culminating in an alkyne, denoted as compound B. --- This description outlines key processes in organic synthesis, demonstrating transformations involving hydrogenation, hydroboration-oxidation, bromination, and dehydrohalogenation. These reactions are fundamental in modifying molecular structures, providing insight into manipulating chemical bonds and introducing functional groups.
Transcribed Image Text:### Chemical Reactions and Mechanisms #### Reaction 1: The starting material is a cyclohexene with an alkyne group attached. It undergoes two steps of reactions: 1. **Hydrogenation with Lindlar Catalyst:** - Reagents: \( \text{H}_2, \) Lindlar's Catalyst. - The alkyne is partially hydrogenated to form an alkene, which is denoted as compound A. 2. **Hydroboration-Oxidation:** - Reagents: \( \text{BH}_3/\text{THF, } \) followed by \( \text{OH}^-, \text{H}_2\text{O}_2, \text{H}_2\text{O} \). - The alkene (A) undergoes hydroboration-oxidation to produce an alcohol, noted as compound B. #### Reaction 2: The starting material is an alkyne. 1. **Bromination:** - Reagents: \( \text{Br}_2 \) in \( \text{CH}_2\text{Cl}_2 \). - The alkyne reacts with bromine to form a dibromo-alkane, identified as compound A. 2. **Dehydrohalogenation:** - Reagents: 2 NaNH\(_2\). - The dibromo-alkane (A) is treated with sodium amide, leading to dehydrohalogenation, culminating in an alkyne, denoted as compound B. --- This description outlines key processes in organic synthesis, demonstrating transformations involving hydrogenation, hydroboration-oxidation, bromination, and dehydrohalogenation. These reactions are fundamental in modifying molecular structures, providing insight into manipulating chemical bonds and introducing functional groups.
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