Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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**Educational Website Content: Reaction Completion Using Reagents**

**Objective:** Choose the best reagents to complete the reaction depicted below.

**Reaction Overview:**  
The schematic shows an organic compound transformation. The initial structure consists of a hydrocarbon with two triple bonds, transforming into a hydrocarbon with a single bond between carbon atoms in the final structure.

**Reagent Options:**

- **A.** \( \text{H}_2(\text{g}) \) / Pt  
  - Hydrogen gas in the presence of a platinum catalyst.

- **B.** \( \text{H}_2(\text{g}) \) / Lindlar's catalyst  
  - Hydrogen gas with Lindlar’s catalyst, used for partial hydrogenation to convert alkynes to cis-alkenes.

- **C.** \( \text{H}_2(\text{g}) \)  
  - Hydrogen gas, potentially indicating a general hydrogenation process.

- **D.** Na / \( \text{NH}_3(\text{l}) \)  
  - A sodium metal and liquid ammonia setup, typically for dissolving metal reductions to convert alkynes to trans-alkenes.

- **E.**  
  1. \( \text{NaBH}_4 \)  
  2. \( \text{H}_3\text{O}^+ \)  
  - Sodium borohydride followed by acid, a common reduction method for carbonyl functionalities.

**Visual Representation:**

- The initial line structure shows a hydrocarbon with multiple triple bonds (depicted with three parallel lines).
- Following the reagent interaction, the final line structure exhibits a hydrocarbon with a singular bond style, indicating complete reduction.

**Task:** Analyze the transformation and choose the appropriate reagent that accomplishes the desired conversion effectively. Consider the nature of each reagent and the extent of hydrogenation required for this chemical reaction.
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Transcribed Image Text:**Educational Website Content: Reaction Completion Using Reagents** **Objective:** Choose the best reagents to complete the reaction depicted below. **Reaction Overview:** The schematic shows an organic compound transformation. The initial structure consists of a hydrocarbon with two triple bonds, transforming into a hydrocarbon with a single bond between carbon atoms in the final structure. **Reagent Options:** - **A.** \( \text{H}_2(\text{g}) \) / Pt - Hydrogen gas in the presence of a platinum catalyst. - **B.** \( \text{H}_2(\text{g}) \) / Lindlar's catalyst - Hydrogen gas with Lindlar’s catalyst, used for partial hydrogenation to convert alkynes to cis-alkenes. - **C.** \( \text{H}_2(\text{g}) \) - Hydrogen gas, potentially indicating a general hydrogenation process. - **D.** Na / \( \text{NH}_3(\text{l}) \) - A sodium metal and liquid ammonia setup, typically for dissolving metal reductions to convert alkynes to trans-alkenes. - **E.** 1. \( \text{NaBH}_4 \) 2. \( \text{H}_3\text{O}^+ \) - Sodium borohydride followed by acid, a common reduction method for carbonyl functionalities. **Visual Representation:** - The initial line structure shows a hydrocarbon with multiple triple bonds (depicted with three parallel lines). - Following the reagent interaction, the final line structure exhibits a hydrocarbon with a singular bond style, indicating complete reduction. **Task:** Analyze the transformation and choose the appropriate reagent that accomplishes the desired conversion effectively. Consider the nature of each reagent and the extent of hydrogenation required for this chemical reaction.
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