Textbook Question
Describe how each of the following compounds could be synthesized from the given starting material.
a.
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Ch. 10 - Reactions of Alcohols, Ethers, Epoxides, Amines, and Sulfur-Containing Compounds
Bruice8th EditionOrganic ChemistryISBN: 9780135213711
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Table of contents
- Ch. 1 - Remembering General Chemistry: Electronic Structure and Bonding (Part 1)31
- Ch. 1 - Remembering General Chemistry: Electronic Structure and Bonding (Part 2)65
- Ch. 2 - Acids and Bases: Central to Understanding Organic Chemistry84
- Ch. 3 - An Introduction to Organic Compounds:Nomenclature, Physical Properties, and Structure183
- Ch. 4 - Isomers: The Arrangement of Atoms in Space121
- Ch. 5 - Alkenes: Structure, Nomenclature, and an Introduction to Reactivity • Thermodynamics and Kinetics83
- Ch. 6 - The Reactions of Alkenes • The Stereochemistry of Addition Reactions175
- Ch. 7 - The Reactions of Alkynes • An Introduction to Multistep Synthesis119
- Ch. 8 - Delocalized Electrons: Their Effect on Stability, pKa, and the Products of a Reaction • Aromaticity and Electronic Effects: An Introduction to the Reactions of Benzene148
- Ch. 9 - Substitution and Elimination Reactions of Alkyl Halides212
- Ch. 10 - Reactions of Alcohols, Ethers, Epoxides, Amines, and Sulfur-Containing Compounds131
- Ch. 11 - Organometallic Compounds60
- Ch. 12 - Radicals90
- Ch. 13 - Mass Spectrometry; Infrared Spectroscopy; UV/Vis Spectroscopy62
- Ch. 14 - NMR Spectroscopy95
- Ch. 15 - Reactions of Carboxylic Acids and Carboxylic Acid Derivatives123
- Ch. 16 - Reactions of Aldehydes and Ketones • More Reactions of Carboxylic Acid Derivatives141
- Ch. 17 - Reactions at the Alpha-Carbon101
- Ch. 18 - Reactions of Benzene and Substituted Benzenes144
- Ch. 19 - More About Amines • Reactions of Heterocyclic Compounds49
- Ch. 20 - The Organic Chemistry of Carbohydrates80
- Ch. 21 - Amino Acids, Peptides, and Proteins57
- Ch. 22 - Catalysis in Organic Reactions and in Enzymatic Reactions35
- Ch. 23 - The Organic Chemistry of the Coenzymes—Compounds Derived from Vitamins1
- Ch. 28 - Pericyclic Reactions58
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Bruice 8th EditionCh. 10 - Reactions of Alcohols, Ethers, Epoxides, Amines, and Sulfur-Containing CompoundsProblem 83a
Bruice 8th EditionCh. 10 - Reactions of Alcohols, Ethers, Epoxides, Amines, and Sulfur-Containing CompoundsProblem 83aChapter 11, Problem 83a
Propose a mechanism for each of the following reactions:
a. 
Verified step by step guidance1
Step 1: Protonation of one of the hydroxyl groups. The sulfuric acid (H₂SO₄) acts as a strong acid and donates a proton (H⁺) to one of the hydroxyl groups (-OH) on the molecule, forming a good leaving group (water, H₂O).
Step 2: Formation of a carbocation intermediate. The protonated hydroxyl group leaves as water (H₂O), generating a carbocation at the adjacent carbon. This carbocation is stabilized by the molecular structure.
Step 3: Intramolecular nucleophilic attack. The remaining hydroxyl group (-OH) acts as a nucleophile and attacks the carbocation, forming a new bond and creating a cyclic intermediate.
Step 4: Deprotonation of the oxygen atom. The oxygen atom in the newly formed cyclic structure is protonated due to the acidic environment. A base (likely HSO₄⁻) removes the proton, stabilizing the cyclic ether product.
Step 5: Final product formation. The reaction results in the formation of a cyclic ether (tetrahydropyran) and hydronium ion (H₃O⁺) as the byproduct.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Ethanol Dehydration
Ethanol dehydration is a chemical reaction where ethanol (an alcohol) loses a water molecule to form an ether. This process typically requires an acid catalyst, such as sulfuric acid, and heat to facilitate the removal of water. Understanding this mechanism is crucial for predicting the products of the reaction and the conditions under which it occurs.
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General Reaction of Dehydration with POCl3
Acid-Catalyzed Reaction Mechanism
In acid-catalyzed reactions, the acid donates a proton (H+) to the reactant, increasing its electrophilicity and making it more reactive. This mechanism often involves the formation of a carbocation intermediate, which can then react with nucleophiles. Recognizing this mechanism is essential for proposing accurate reaction pathways in organic chemistry.
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06:34Acid-catalyzed hydration mechanism
Ether Formation
Ether formation involves the reaction of two alcohol molecules, leading to the creation of an ether and water. This process can occur through various mechanisms, including the condensation of alcohols in the presence of an acid catalyst. Understanding the structural features of the reactants and the conditions required for ether formation is vital for predicting the outcome of the reaction.
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04:22How to predict the products of Ether Cleavage.
Related Practice
Textbook Question
Propose a mechanism for each of the following reactions:
b.
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Textbook Question
When the following seven-membered ring alcohol is dehydrated, three alkenes are formed. Propose a mechanism for their formation.
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Textbook Question
a. Propose a mechanism for the following reaction:
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Textbook Question
Triethylene glycol is one of the products obtained from the reaction of excess ethylene oxide and hydroxide ion. Propose a mechanism for its formation.
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Textbook Question
Ethylene oxide reacts readily with HO- because of the strain in the three-membered ring. Explain why cyclopropane, a compound with approximately the same amount of strain, does not react with HO-.
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