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2. A.Electrons in a cyclic conjugated system.| B.The compound is (a, aa, or na)

2. A.Electrons in a cyclic conjugated system.| B.The compound is (a, aa, or na)

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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**Instructions:** **A.** Determine the number of electrons in a system of cyclic conjugation (zero if no cyclic conjugation). **B.** Specify whether the species is "a"-aromatic, "aa"-anti-aromatic, or "na"-non-aromatic (neither aromatic nor anti-aromatic). (Presume rings to be planar unless the structure obviously prevents planarity. If there is more than one conjugated ring, count electrons in the largest.) --- **1.** - **Structure:** A heterocyclic compound with two nitrogen atoms and a methyl group attached. - **A. Electrons in a cyclic conjugated system:** 6 - **B. The compound is (a, aa, or na):** a --- **2.** - **Structure:** A phenyl group attached to an oxygen with a lone pair, forming a ketone-like structure. - **A. Electrons in a cyclic conjugated system:** [Blank space] - **B. The compound is (a, aa, or na):** [Blank space] --- **Explanation for Graphs/Diagrams:** 1. **Diagram 1:** Displays a six-membered aromatic ring (likely a pyridine derivative) with nitrogen atoms and a methyl group indicating conjugated pi-electron systems. 2. **Diagram 2:** Displays a benzene ring with a ketone group at one of the carbons along the ring, showing potential delocalization of pi electrons involving the oxygen.
Transcribed Image Text:**Instructions:** **A.** Determine the number of electrons in a system of cyclic conjugation (zero if no cyclic conjugation). **B.** Specify whether the species is "a"-aromatic, "aa"-anti-aromatic, or "na"-non-aromatic (neither aromatic nor anti-aromatic). (Presume rings to be planar unless the structure obviously prevents planarity. If there is more than one conjugated ring, count electrons in the largest.) --- **1.** - **Structure:** A heterocyclic compound with two nitrogen atoms and a methyl group attached. - **A. Electrons in a cyclic conjugated system:** 6 - **B. The compound is (a, aa, or na):** a --- **2.** - **Structure:** A phenyl group attached to an oxygen with a lone pair, forming a ketone-like structure. - **A. Electrons in a cyclic conjugated system:** [Blank space] - **B. The compound is (a, aa, or na):** [Blank space] --- **Explanation for Graphs/Diagrams:** 1. **Diagram 1:** Displays a six-membered aromatic ring (likely a pyridine derivative) with nitrogen atoms and a methyl group indicating conjugated pi-electron systems. 2. **Diagram 2:** Displays a benzene ring with a ketone group at one of the carbons along the ring, showing potential delocalization of pi electrons involving the oxygen.
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