Textbook Question
Suggest a synthesis of the molecule on the right beginning with the molecules on the left.
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Ch. 23 - Benzene I: Aromatic Stability and Substitution Reactions
Mullins1st EditionOrganic Chemistry: A Learner Centered ApproachISBN: 9780137566471
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Table of contents
- Ch. 2 - General Chemistry Translated: Finding the Electrons114
- Ch. 3 - Alkanes and Cycloalkanes: Properties and Conformational Analysis109
- Ch. 4 - Acids and Bases: Electron Flow144
- Ch. 5 - Chemical Reaction Analysis: Thermodynamics and Kinetics118
- Ch. 6 - Stereoisomerism: Arrangement of Atoms in Space112
- Ch. 7 - Principles of Green (Organic) Chemistry3
- Ch. 8 - Alkenes I: Properties and Electrophilic Additions158
- Ch. 9 - Alkenes II: Oxidation and Reduction150
- Ch. 10 - Alkynes: Electrophilic Addition and Redox Reactions101
- Ch. 11 - Properties and Synthesis of Alkyl Halides: Radical Reactions108
- Ch. 12 - Substitution and Elimination: Reactions of Haloalkanes172
- Ch. 13 - Alcohols, Ethers and Related Compounds: Substitution and Elimination239
- Ch. 14 - Structural Identification I: Infrared Spectroscopy and Mass Spectrometry54
- Ch. 15 - Structural Identification II: Nuclear Magnetic Resonance Spectroscopy93
- Ch. 16 - Metals in Organic Chemistry48
- Ch. 17 - Carbonyl Addition Reactions: Aldehydes and Ketones45
- Ch. 18 - Nucleophilic Acyl Substitution I: Carboxylic Acids18
- Ch. 19 - Nucleophilic Acyl Substitution II: Carboxylic Acid Derivatives39
- Ch. 20 - Enolates: Carbonyl Addition and Substitution13
- Ch. 21 - Conjugated Systems I: Stability and Addition Reactions56
- Ch. 22 - Conjugated Systems II: Pericyclic Reactions54
- Ch. 23 - Benzene I: Aromatic Stability and Substitution Reactions64
- Ch. 24 - Benzene II: Reactions Influenced by the Aromatic Ring62
- Ch. 25 - Amines: Structure, Reactions, and Synthesis27
- Ch. 26 - Amino Acids, Proteins, and Peptide Synthesis9
- Ch. 27 - Carbohydrates, Nucleic Acids, and Lipids54
Mullins1st EditionOrganic Chemistry: A Learner Centered ApproachISBN: 9780137566471Not the one you use?Change textbook
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Mullins 1st EditionCh. 23 - Benzene I: Aromatic Stability and Substitution ReactionsProblem 92
Mullins 1st EditionCh. 23 - Benzene I: Aromatic Stability and Substitution ReactionsProblem 92Chapter 22, Problem 92
Suggest an arrow-pushing mechanism of the following rearrangement.
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Identify the functional groups involved in the rearrangement. The starting material contains a sulfonic acid group (SO3H) attached to a phenol group, and the product has a sulfonic acid group attached to an ether linkage.
Recognize the role of the base, NaOH, in the reaction. The hydroxide ion (OH-) can act as a nucleophile and initiate the rearrangement by attacking the sulfonic acid group.
Propose the first step of the mechanism: the hydroxide ion attacks the sulfur atom of the sulfonic acid group, leading to the formation of a negatively charged intermediate where the sulfur atom is bonded to an additional oxygen atom.
Suggest the next step: the negatively charged oxygen atom can facilitate the rearrangement by forming a bond with the adjacent phenolic oxygen, resulting in the cleavage of the S-O bond and formation of the ether linkage.
Conclude the mechanism by showing the final proton transfer step, where the newly formed ether oxygen atom donates a proton to regenerate the sulfonic acid group, completing the rearrangement.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Arrow-Pushing Mechanism
Arrow-pushing mechanisms are a way to illustrate the movement of electrons during chemical reactions. In organic chemistry, these diagrams show how nucleophiles and electrophiles interact, helping to visualize the formation and breaking of bonds. Understanding this concept is crucial for predicting the outcome of reactions and for proposing mechanisms for rearrangements.
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General Mechanism
Rearrangement Reactions
Rearrangement reactions involve the structural reorganization of a molecule, resulting in the formation of an isomer. These reactions often occur through the migration of atoms or groups within the molecule, influenced by factors such as stability and sterics. Recognizing the type of rearrangement and the stability of intermediates is essential for proposing accurate mechanisms.
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Stability of Intermediates
The stability of intermediates, such as carbocations or carbanions, plays a critical role in determining the pathway of a rearrangement reaction. More stable intermediates are favored and can lead to faster reaction rates. Understanding the factors that influence stability, such as resonance and inductive effects, is vital for predicting the mechanism and products of the rearrangement.
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Related Practice
Textbook Question
How might you use 13C NMR spectroscopy to differentiate between the possible ortho, meta, and para products of the electrophilic aromatic substitution reaction shown?
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Textbook Question
Addition by the benzyne mechanism is not usually regioselective. Explain the fact that the reaction shown is highly regioselective for the product shown.
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Textbook Question
Acetohexamide is used to treat type 2 diabetes that cannot be well controlled by diet alone. Fill in the blanks of the synthetic scheme used to synthesize acetohexamide. [Hints have been provided below each step.]
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