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Which is an energy diagram for a concerted reaction (SN2 and E2)? A B C D

Which is an energy diagram for a concerted reaction (SN2 and E2)? A B C D

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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Which is an energy diagram for a concerted reaction (SN2 and E2)?

A

B

C

D

### Understanding Energy Diagrams in Concerted Reactions (S<sub>N</sub>2 and E2) **Question: Which is an energy diagram for a concerted reaction (S<sub>N</sub>2 and E2)?** In the given image, we have four different energy diagrams labeled as A, B, C, and D. Each diagram plots the free energy (kJ/mol) on the y-axis against the reaction coordinate on the x-axis. Let's analyze each diagram to determine the correct one for concerted reactions such as S<sub>N</sub>2 and E2, which occur in a single, concerted step. **Diagram Analysis:** 1. **Diagram A:** - This diagram shows a smooth transition with a single peak, indicating a one-step reaction where the reactants convert to products through a single transition state. This is typical of concerted reactions such as S<sub>N</sub>2 and E2. 2. **Diagram B:** - This diagram has multiple energy barriers and intermediates, indicating a multi-step reaction process. This is not characteristic of concerted reactions, which occur in a single step. 3. **Diagram C:** - This diagram also shows multiple peaks, similar to Diagram B, which suggests multiple steps and transition states. This does not correspond to concerted reactions. 4. **Diagram D:** - This diagram shows a continuous increase in energy with no distinct peaks, suggesting a different type of process that does not match the characteristics of S<sub>N</sub>2 or E2 reactions. **Conclusion:** - The correct energy diagram for a concerted reaction, such as S<sub>N</sub>2 and E2, is diagram **A**. This diagram shows a single transition state, which is indicative of a concerted process where the reactants are directly converted to products in one continuous step.
Transcribed Image Text:### Understanding Energy Diagrams in Concerted Reactions (S<sub>N</sub>2 and E2) **Question: Which is an energy diagram for a concerted reaction (S<sub>N</sub>2 and E2)?** In the given image, we have four different energy diagrams labeled as A, B, C, and D. Each diagram plots the free energy (kJ/mol) on the y-axis against the reaction coordinate on the x-axis. Let's analyze each diagram to determine the correct one for concerted reactions such as S<sub>N</sub>2 and E2, which occur in a single, concerted step. **Diagram Analysis:** 1. **Diagram A:** - This diagram shows a smooth transition with a single peak, indicating a one-step reaction where the reactants convert to products through a single transition state. This is typical of concerted reactions such as S<sub>N</sub>2 and E2. 2. **Diagram B:** - This diagram has multiple energy barriers and intermediates, indicating a multi-step reaction process. This is not characteristic of concerted reactions, which occur in a single step. 3. **Diagram C:** - This diagram also shows multiple peaks, similar to Diagram B, which suggests multiple steps and transition states. This does not correspond to concerted reactions. 4. **Diagram D:** - This diagram shows a continuous increase in energy with no distinct peaks, suggesting a different type of process that does not match the characteristics of S<sub>N</sub>2 or E2 reactions. **Conclusion:** - The correct energy diagram for a concerted reaction, such as S<sub>N</sub>2 and E2, is diagram **A**. This diagram shows a single transition state, which is indicative of a concerted process where the reactants are directly converted to products in one continuous step.
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