Textbook Question
The following ethers are ranked according to their ability to form explosive peroxides. Explain this ranking based on your knowledge of the reaction mechanism.
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Ch. 11 - Properties and Synthesis of Alkyl Halides: Radical 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. 11 - Properties and Synthesis of Alkyl Halides: Radical ReactionsProblem 52b
Mullins 1st EditionCh. 11 - Properties and Synthesis of Alkyl Halides: Radical ReactionsProblem 52bChapter 10, Problem 52b
Provide the mechanism of the radical reactions shown.
(b) 
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Identify the type of radical reaction involved. Radical reactions typically include initiation, propagation, and termination steps.
Initiation: Determine the source of radicals. This often involves the homolytic cleavage of a bond, usually facilitated by heat or light, to generate two radicals. Represent this step using curved single-headed arrows to show the movement of a single electron.
Propagation: Identify the steps where radicals react with stable molecules to form new radicals. This usually involves two main steps: the radical reacts with a molecule to form a new radical and a new molecule, and then this new radical reacts further to propagate the chain reaction. Use single-headed arrows to show electron movement.
Termination: Determine how the radicals are removed from the reaction mixture. This can occur when two radicals combine to form a stable molecule, effectively ending the chain reaction. Again, use single-headed arrows to depict the electron pairing.
Draw the complete mechanism, ensuring that all steps are balanced in terms of electron count and that the movement of electrons is clearly indicated with appropriate arrows. Verify that the mechanism is consistent with the principles of radical stability and reactivity.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Radical Formation
Radical formation involves the homolytic cleavage of a covalent bond, resulting in two radicals, each possessing an unpaired electron. This process is typically initiated by heat or light, which provides the energy needed to break the bond. Understanding how radicals are generated is crucial for predicting the behavior and reactivity in radical reactions.
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Radical Polymerization Concept 4
Propagation Steps
Propagation steps in radical reactions involve the radicals reacting with stable molecules to form new radicals, perpetuating the reaction cycle. These steps are essential for the continuation of the radical chain reaction, where the radical species generated in one step react further to produce additional radicals, driving the reaction forward until termination.
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Termination Steps
Termination steps occur when two radical species combine to form a stable, non-radical product, effectively ending the radical chain reaction. This can happen through various pathways, such as radical recombination or disproportionation. Understanding termination is key to controlling radical reactions and preventing unwanted side reactions or polymerization.
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Related Practice
Textbook Question
For the following reaction, answer questions (a)–(d).
(d) Given your choice in (b), why is it the weakest bond?
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Textbook Question
The solvent tetrahydrofuran (THF) is often sold with a small amount of BHT added. Provide a mechanism that explains why this might be so.
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Textbook Question
For the following reaction, answer questions (a)–(d).
(b) Which is the weakest bond in molecule A?
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Textbook Question
Provide the mechanism of the radical reactions shown.
(a)
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Textbook Question
One danger associated with storing ether solvents is their tendency to form explosive peroxides when exposed to oxygen. Suggest a mechanism by which the hydroperoxide might form. You can assume the presence of X• to start the reaction.
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