C. D. + :O: The lone pair in compound C is Compound C is In compound D, not aromatic. aromatic. delocalized. not delocalized. one lone pair is delocalized. both lone pairs are not delocalized. both lone pairs are delocalized. Compound

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
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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## Aromaticity and Lone Pair Delocalization in Compounds

### Compound C

- **Structure**: The diagram shows a six-membered aromatic ring (similar to a pyrilium ion) with an oxygen atom featuring a lone pair of electrons. The ring includes a positive charge on the oxygen atom.
- **Questions**:
  - *The lone pair in compound C is*: 
    - Options: delocalized, not delocalized.
  - *Compound C is*: 
    - Options: aromatic, not aromatic.

### Compound D

- **Structure**: The diagram depicts a five-membered ring with an oxygen atom featuring two lone pairs of electrons.
- **Questions**:
  - *In compound D*:
    - Options:
      - one lone pair is delocalized.
      - both lone pairs are not delocalized.
      - both lone pairs are delocalized.

---

### Explanation

- Delocalization of lone pairs in cyclic compounds can lead to aromaticity, which adds stability to the compound. Understanding whether the lone pairs are delocalized can help determine if a compound is aromatic or not. Analyze the structures to determine the localization and implications on aromaticity for both compounds C and D.
Transcribed Image Text:## Aromaticity and Lone Pair Delocalization in Compounds ### Compound C - **Structure**: The diagram shows a six-membered aromatic ring (similar to a pyrilium ion) with an oxygen atom featuring a lone pair of electrons. The ring includes a positive charge on the oxygen atom. - **Questions**: - *The lone pair in compound C is*: - Options: delocalized, not delocalized. - *Compound C is*: - Options: aromatic, not aromatic. ### Compound D - **Structure**: The diagram depicts a five-membered ring with an oxygen atom featuring two lone pairs of electrons. - **Questions**: - *In compound D*: - Options: - one lone pair is delocalized. - both lone pairs are not delocalized. - both lone pairs are delocalized. --- ### Explanation - Delocalization of lone pairs in cyclic compounds can lead to aromaticity, which adds stability to the compound. Understanding whether the lone pairs are delocalized can help determine if a compound is aromatic or not. Analyze the structures to determine the localization and implications on aromaticity for both compounds C and D.
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