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12. Which of the compounds is most acidic? NH₂ NH₂ 882 IV

12. Which of the compounds is most acidic? NH₂ NH₂ 882 IV

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 of the following is most acidic? And why?

### Question 12: Which of the compounds is most acidic? The image presents five different compounds labeled I through V, each consisting of a six-membered ring (hexagon) with an amine group (-NH2) attached. 1. **Compound I**: - Structure: Benzene ring (three alternating double bonds) with an amine group attached. 2. **Compound II**: - Structure: Benzene ring (three alternating double bonds) with an amine group attached, similar to Compound I. 3. **Compound III**: - Structure: Cyclohexene ring (one double bond) with an amine group attached. 4. **Compound IV**: - Structure: Cyclohexene ring (one double bond) with an amine group attached, similar to Compound III. 5. **Compound V**: - Structure: Cyclohexane ring (no double bonds) with an amine group attached. ### Diagram Explanation: - **Compounds I and II** feature a benzene ring, which is aromatic, with three alternating double bonds. - **Compounds III and IV** are cyclohexene structures with a single double bond. - **Compound V** is a cyclohexane structure with no double bonds. To determine the most acidic compound, consider the electron-withdrawing effects and stabilization of the conjugate base. Aromatic compounds like benzene rings (as in Compounds I and II) tend to have more acidic protons compared to non-aromatic structures due to the stability provided by resonance. Therefore, Compounds I and II are likely more acidic than Compounds III, IV, and V, with the exact comparison potentially considering minor resonance and inductive effects, but both I and II may be nearly equal in their acidic properties.
Transcribed Image Text:### Question 12: Which of the compounds is most acidic? The image presents five different compounds labeled I through V, each consisting of a six-membered ring (hexagon) with an amine group (-NH2) attached. 1. **Compound I**: - Structure: Benzene ring (three alternating double bonds) with an amine group attached. 2. **Compound II**: - Structure: Benzene ring (three alternating double bonds) with an amine group attached, similar to Compound I. 3. **Compound III**: - Structure: Cyclohexene ring (one double bond) with an amine group attached. 4. **Compound IV**: - Structure: Cyclohexene ring (one double bond) with an amine group attached, similar to Compound III. 5. **Compound V**: - Structure: Cyclohexane ring (no double bonds) with an amine group attached. ### Diagram Explanation: - **Compounds I and II** feature a benzene ring, which is aromatic, with three alternating double bonds. - **Compounds III and IV** are cyclohexene structures with a single double bond. - **Compound V** is a cyclohexane structure with no double bonds. To determine the most acidic compound, consider the electron-withdrawing effects and stabilization of the conjugate base. Aromatic compounds like benzene rings (as in Compounds I and II) tend to have more acidic protons compared to non-aromatic structures due to the stability provided by resonance. Therefore, Compounds I and II are likely more acidic than Compounds III, IV, and V, with the exact comparison potentially considering minor resonance and inductive effects, but both I and II may be nearly equal in their acidic properties.
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