What is the major product formed in the reaction below? H2 Lindlar catalyst II II IV

Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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**Question:**  
What is the major product formed in the reaction below?

**Reaction Details:**  
- Reactant: Cyclohexyl-ethyne (a triple-bond structure)
- Reagents: Hydrogen gas (\( H_2 \))
- Catalyst: Lindlar catalyst

**Possible Products:**  
I. Cyclohexyl-ethene (cis-alkene)  
II. Cyclohexyl-alkane  
III. Trans-cyclohexyl-ethene (trans-alkene)  
IV. 1,4-Cyclohexyl-butadiene (conjugated diene)

**Choices:**  
- ☐ I  
- ☐ II  
- ☐ III  
- ☐ IV 

The Lindlar catalyst selectively hydrogenates triple bonds to cis-alkenes. Therefore, the major product is likely to be option I.
Transcribed Image Text:**Question:** What is the major product formed in the reaction below? **Reaction Details:** - Reactant: Cyclohexyl-ethyne (a triple-bond structure) - Reagents: Hydrogen gas (\( H_2 \)) - Catalyst: Lindlar catalyst **Possible Products:** I. Cyclohexyl-ethene (cis-alkene) II. Cyclohexyl-alkane III. Trans-cyclohexyl-ethene (trans-alkene) IV. 1,4-Cyclohexyl-butadiene (conjugated diene) **Choices:** - ☐ I - ☐ II - ☐ III - ☐ IV The Lindlar catalyst selectively hydrogenates triple bonds to cis-alkenes. Therefore, the major product is likely to be option I.
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