Homework Help is Here – Start Your Trial Now!
Science
Chemistry
Lindlar Catalyst

Lindlar Catalyst

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...
See similar textbooks
icon
Related questions
Question

Predict the product and explain the difference in reaction outcome.

The image displays two chemical reactions involving hydrogenation of an alkyne group in a cyclic compound. 1. **First Reaction:** - **Reactant:** A cyclic compound with an alkyne group (a triple bond) is shown. - **Reagent:** Hydrogen gas (H₂) and palladium (Pd) are used. - **Product:** The reaction likely results in the full hydrogenation of the alkyne to form an alkane, indicating that the triple bond is completely reduced to a single bond. 2. **Second Reaction:** - **Reactant:** The same cyclic compound with an alkyne group as in the first reaction. - **Reagent:** Hydrogen gas (H₂) with a Lindlar Catalyst is used. - **Product:** The reaction results in the partial hydrogenation of the alkyne to form a cis-alkene, where the triple bond is reduced to a double bond, maintaining the cis configuration. ### Explanation of the Catalysts: - **Palladium (Pd):** A catalyst used for complete hydrogenation of alkynes to alkanes, typically resulting in the saturation of the compound. - **Lindlar Catalyst:** A poisoned palladium catalyst that allows for the syn addition of hydrogen to alkynes, facilitating the formation of cis-alkenes without further reduction to alkanes.
Transcribed Image Text:The image displays two chemical reactions involving hydrogenation of an alkyne group in a cyclic compound. 1. **First Reaction:** - **Reactant:** A cyclic compound with an alkyne group (a triple bond) is shown. - **Reagent:** Hydrogen gas (H₂) and palladium (Pd) are used. - **Product:** The reaction likely results in the full hydrogenation of the alkyne to form an alkane, indicating that the triple bond is completely reduced to a single bond. 2. **Second Reaction:** - **Reactant:** The same cyclic compound with an alkyne group as in the first reaction. - **Reagent:** Hydrogen gas (H₂) with a Lindlar Catalyst is used. - **Product:** The reaction results in the partial hydrogenation of the alkyne to form a cis-alkene, where the triple bond is reduced to a double bond, maintaining the cis configuration. ### Explanation of the Catalysts: - **Palladium (Pd):** A catalyst used for complete hydrogenation of alkynes to alkanes, typically resulting in the saturation of the compound. - **Lindlar Catalyst:** A poisoned palladium catalyst that allows for the syn addition of hydrogen to alkynes, facilitating the formation of cis-alkenes without further reduction to alkanes.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 1 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Polymerization Kinetics
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Chemistry
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
SEE MORE TEXTBOOKS