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please Label each compound as aromatic, nonromantic, or anti aromatic.

please Label each compound as aromatic, nonromantic, or anti aromatic.

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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please Label each compound as aromatic, nonromantic, or anti aromatic.

The image displays chemical structures of three heterocyclic compounds, each containing five-membered rings with heteroatoms. 1. **Thiophene (C4H4S):** - Structure: A five-membered ring with four carbon atoms and one sulfur atom. - Notably, two double bonds are present, creating an aromatic compound similar to benzene. 2. **Pyrrole (C4H5N):** - Structure: A five-membered ring with four carbon atoms and one nitrogen atom, denoted by "H-N" at the top. - The compound is aromatic and includes two double bonds. The nitrogen atom contains a lone pair of electrons contributing to the compound's aromaticity. 3. **Pyrrolenium Cation (C4H4N⁺):** - Structure: Similar to pyrrole, but the nitrogen atom carries a positive charge (indicated by "N⁺"). - This positive charge affects the electronic properties of the molecule, differentiating it from neutral pyrrole. These structures are commonly studied in organic chemistry due to their importance in medicinal chemistry and material science. The heteroatoms significantly influence the chemical reactivity and electronic characteristics of these aromatic systems.
Transcribed Image Text:The image displays chemical structures of three heterocyclic compounds, each containing five-membered rings with heteroatoms. 1. **Thiophene (C4H4S):** - Structure: A five-membered ring with four carbon atoms and one sulfur atom. - Notably, two double bonds are present, creating an aromatic compound similar to benzene. 2. **Pyrrole (C4H5N):** - Structure: A five-membered ring with four carbon atoms and one nitrogen atom, denoted by "H-N" at the top. - The compound is aromatic and includes two double bonds. The nitrogen atom contains a lone pair of electrons contributing to the compound's aromaticity. 3. **Pyrrolenium Cation (C4H4N⁺):** - Structure: Similar to pyrrole, but the nitrogen atom carries a positive charge (indicated by "N⁺"). - This positive charge affects the electronic properties of the molecule, differentiating it from neutral pyrrole. These structures are commonly studied in organic chemistry due to their importance in medicinal chemistry and material science. The heteroatoms significantly influence the chemical reactivity and electronic characteristics of these aromatic systems.
Expert Solution
Step 1

Aromatic compounds are those compounds

  • Which are monocyclic compounds.
  • which are planar i.e. all contributing elements are either sp or sp2 hybridised.
  • Which follow Huckel's 4n+2 pi electron rule.
  • Having conjugation.

Anti aromatic and non aromatic compounds have 4n pi electrons.

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