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(a) (b) CH3 II... CH3 CH3 OH H₂/Pt ? ChemDoodle H₂/Pt

(a) (b) CH3 II... CH3 CH3 OH H₂/Pt ? ChemDoodle H₂/Pt

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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### Hydrogenation Reactions #### (a) Hydrogenation of an Unsaturated Alcohol - **Reactant Structure**: The reactant is an unsaturated alcohol, specifically a complex alkene with an -OH group attached. - **Reaction Conditions**: The reaction occurs in the presence of hydrogen gas (H₂) and a platinum catalyst (Pt). - **Process**: This reaction involves the hydrogenation of the alkene group, where hydrogen molecules add across the double bond, converting it into a single bond. - **Diagram**: The diagram shows the chemical structure of the reactant on the left, an arrow indicating the reaction process, and conditions above the arrow (H₂/Pt). The product side is empty, suggesting interpretation of a fully saturated alcohol product. #### (b) Hydrogenation of a Tri-substituted Cycloalkene - **Reactant Structure**: The reactant is a tri-substituted cycloalkene, depicted in a three-dimensional chair conformation, where the cyclohexane ring has three methyl (CH₃) groups attached. - **Reaction Conditions**: Similarly to the first reaction, this one also takes place in the presence of hydrogen gas and a platinum catalyst. - **Process**: The hydrogenation process involves the addition of hydrogen to the cycloalkene, saturating the ring structure. - **Diagram**: The diagram shows the reactant's 3D structure on the left, an arrow with reaction conditions (H₂/Pt) above it. The right side indicates formation of a saturated product. This set of reactions exemplifies how hydrogenation can be used to transform unsaturated compounds into saturated ones by adding hydrogen, with the assistance of a catalyst.
Transcribed Image Text:### Hydrogenation Reactions #### (a) Hydrogenation of an Unsaturated Alcohol - **Reactant Structure**: The reactant is an unsaturated alcohol, specifically a complex alkene with an -OH group attached. - **Reaction Conditions**: The reaction occurs in the presence of hydrogen gas (H₂) and a platinum catalyst (Pt). - **Process**: This reaction involves the hydrogenation of the alkene group, where hydrogen molecules add across the double bond, converting it into a single bond. - **Diagram**: The diagram shows the chemical structure of the reactant on the left, an arrow indicating the reaction process, and conditions above the arrow (H₂/Pt). The product side is empty, suggesting interpretation of a fully saturated alcohol product. #### (b) Hydrogenation of a Tri-substituted Cycloalkene - **Reactant Structure**: The reactant is a tri-substituted cycloalkene, depicted in a three-dimensional chair conformation, where the cyclohexane ring has three methyl (CH₃) groups attached. - **Reaction Conditions**: Similarly to the first reaction, this one also takes place in the presence of hydrogen gas and a platinum catalyst. - **Process**: The hydrogenation process involves the addition of hydrogen to the cycloalkene, saturating the ring structure. - **Diagram**: The diagram shows the reactant's 3D structure on the left, an arrow with reaction conditions (H₂/Pt) above it. The right side indicates formation of a saturated product. This set of reactions exemplifies how hydrogenation can be used to transform unsaturated compounds into saturated ones by adding hydrogen, with the assistance of a catalyst.
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Step 1: Reagent:

H2/Pt is a reducing agent, it reduces alkene to alkane 


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