+ ČH3 azulene

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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What is the mechanism?

This image depicts a chemical reaction leading to the formation of azulene. The starting materials are a pyridinium ion and a cyclopentadienyl anion.

1. **Structures:**
   - On the left, there is a six-membered aromatic ring with a nitrogen atom (pyridinium) denoted by "N⁺" with a methyl group attached (CH₃), indicating a positive charge.
   - Next to it is a five-membered ring with three alternating double bonds (cyclopentadienyl), depicted with a negative charge.

2. **Reaction Conditions:**
   - A heat symbol (Δ) is shown above the reaction arrow, indicating that the reaction requires heating.

3. **Product:**
   - On the right, azulene is shown, characterized by the fusion of a five-membered and a seven-membered ring system. The structure maintains aromaticity in a non-benzene system, giving azulene its distinctive properties.

This reaction showcases a pathway to synthesize azulene, which is a compound known for its unique color and properties differing from other aromatic hydrocarbons.
Transcribed Image Text:This image depicts a chemical reaction leading to the formation of azulene. The starting materials are a pyridinium ion and a cyclopentadienyl anion. 1. **Structures:** - On the left, there is a six-membered aromatic ring with a nitrogen atom (pyridinium) denoted by "N⁺" with a methyl group attached (CH₃), indicating a positive charge. - Next to it is a five-membered ring with three alternating double bonds (cyclopentadienyl), depicted with a negative charge. 2. **Reaction Conditions:** - A heat symbol (Δ) is shown above the reaction arrow, indicating that the reaction requires heating. 3. **Product:** - On the right, azulene is shown, characterized by the fusion of a five-membered and a seven-membered ring system. The structure maintains aromaticity in a non-benzene system, giving azulene its distinctive properties. This reaction showcases a pathway to synthesize azulene, which is a compound known for its unique color and properties differing from other aromatic hydrocarbons.
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