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Which properly shows resonance of an allylic system? B C H. O: D

Which properly shows resonance of an allylic system? B C H. O: 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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**Title: Understanding Resonance in Allylic Systems** --- **Question 9: Which properly shows resonance of an allylic system?** Remaining Time: 1 hour, 39 minutes, 41 seconds. **Options:** - **A)** Displays resonance structures with a positively charged carbon atom. The resonance involves the shifting of double bonds and the positive charge between carbon atoms in a cyclic structure. - **B)** Shows resonance structures with a carbanion adjacent to a double bond. The resonance movement involves shifting the negative charge and pi electrons between the bonded atoms. - **C)** Illustrates resonance between a carbocation and a double bond in an open-chain structure, where a hydrogen atom and double bond shift involving positive charges take place. - **D)** Exhibits a pair of resonance structures with a pi bond and an adjacent negative charge. The lone pair and double bond electrons are shown moving between structures in a five-membered ring. **Answer Options:** - D - C - B - A **Note:** Moving to another question will save this response. --- **Explanation:** This question tests the understanding of resonance in organic chemistry, specifically in allylic systems. Resonance in these systems involves the delocalization of electrons, often signified by arrows indicating electron movement. When assessing the given options, look for appropriate electron movement that satisfies the octet rule and maintains the stability of the molecules.
Transcribed Image Text:**Title: Understanding Resonance in Allylic Systems** --- **Question 9: Which properly shows resonance of an allylic system?** Remaining Time: 1 hour, 39 minutes, 41 seconds. **Options:** - **A)** Displays resonance structures with a positively charged carbon atom. The resonance involves the shifting of double bonds and the positive charge between carbon atoms in a cyclic structure. - **B)** Shows resonance structures with a carbanion adjacent to a double bond. The resonance movement involves shifting the negative charge and pi electrons between the bonded atoms. - **C)** Illustrates resonance between a carbocation and a double bond in an open-chain structure, where a hydrogen atom and double bond shift involving positive charges take place. - **D)** Exhibits a pair of resonance structures with a pi bond and an adjacent negative charge. The lone pair and double bond electrons are shown moving between structures in a five-membered ring. **Answer Options:** - D - C - B - A **Note:** Moving to another question will save this response. --- **Explanation:** This question tests the understanding of resonance in organic chemistry, specifically in allylic systems. Resonance in these systems involves the delocalization of electrons, often signified by arrows indicating electron movement. When assessing the given options, look for appropriate electron movement that satisfies the octet rule and maintains the stability of the molecules.
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