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S. t. 1. NaNH2 2. CH3Br Cl₂ (excess) 1. NaNH2 2. Br

S. t. 1. NaNH2 2. CH3Br Cl₂ (excess) 1. NaNH2 2. Br

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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Draw the major product to each of the following reactions.

### Chemical Reactions with Alkyne Compounds Below are detailed descriptions and representations of reactions involving alkynes: #### Reaction r. **Reactants:** - An alkyne with a propargyl group is treated sequentially with: 1. Sodium amide (NaNH₂). 2. Methyl bromide (CH₃Br). **Chemical Transformation:** - Step 1: Sodium amide deprotonates the terminal alkyne, creating a nucleophilic acetylide ion. - Step 2: The acetylide ion then attacks the methyl bromide, resulting in an alkylation reaction that forms a new alkyne. **Diagram:** ``` ≡ | 1. NaNH₂ ≡––– → 2. CH₃Br | ``` #### Reaction s. **Reactants:** - An alkyne with an isopropyl group is treated with excess chlorine (Cl₂). **Chemical Transformation:** - The reaction proceeds through a halogenation process where the excess chlorine reacts with the alkyne, leading to the addition of chlorine atoms across the triple bond until it is fully saturated. **Diagram:** ``` ≡ Cl₂ (excess) | → ≡––– | ``` #### Reaction t. **Reactants:** - An alkyne with an isopropyl group is treated sequentially with: 1. Sodium amide (NaNH₂). 2. Ethyl bromide (C₂H₅Br). **Chemical Transformation:** - Step 1: Sodium amide deprotonates the terminal alkyne, creating a nucleophilic acetylide ion. - Step 2: The acetylide ion then attacks the ethyl bromide, resulting in an alkylation reaction that forms a new alkyne. **Diagram:** ``` ≡ | 1. NaNH₂ ≡––– → 2. C₂H₅Br | ``` These transformations demonstrate the versatility of alkyne compounds in organic synthesis, particularly the creation of more complex molecules through alkylation and halogenation reactions.
Transcribed Image Text:### Chemical Reactions with Alkyne Compounds Below are detailed descriptions and representations of reactions involving alkynes: #### Reaction r. **Reactants:** - An alkyne with a propargyl group is treated sequentially with: 1. Sodium amide (NaNH₂). 2. Methyl bromide (CH₃Br). **Chemical Transformation:** - Step 1: Sodium amide deprotonates the terminal alkyne, creating a nucleophilic acetylide ion. - Step 2: The acetylide ion then attacks the methyl bromide, resulting in an alkylation reaction that forms a new alkyne. **Diagram:** ``` ≡ | 1. NaNH₂ ≡––– → 2. CH₃Br | ``` #### Reaction s. **Reactants:** - An alkyne with an isopropyl group is treated with excess chlorine (Cl₂). **Chemical Transformation:** - The reaction proceeds through a halogenation process where the excess chlorine reacts with the alkyne, leading to the addition of chlorine atoms across the triple bond until it is fully saturated. **Diagram:** ``` ≡ Cl₂ (excess) | → ≡––– | ``` #### Reaction t. **Reactants:** - An alkyne with an isopropyl group is treated sequentially with: 1. Sodium amide (NaNH₂). 2. Ethyl bromide (C₂H₅Br). **Chemical Transformation:** - Step 1: Sodium amide deprotonates the terminal alkyne, creating a nucleophilic acetylide ion. - Step 2: The acetylide ion then attacks the ethyl bromide, resulting in an alkylation reaction that forms a new alkyne. **Diagram:** ``` ≡ | 1. NaNH₂ ≡––– → 2. C₂H₅Br | ``` These transformations demonstrate the versatility of alkyne compounds in organic synthesis, particularly the creation of more complex molecules through alkylation and halogenation reactions.
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