Textbook Question
Classify the following molecules as hydrophilic, hydrophobic, lipophilic, or lipophobic. Each molecule should have two classifications.
(d)
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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 10c
Mullins 1st EditionCh. 11 - Properties and Synthesis of Alkyl Halides: Radical ReactionsProblem 10cChapter 10, Problem 10c
Predict the product of the following haloalkane syntheses.
(c) HBr↗HOOH
Verified step by step guidance1
Identify the type of reaction: The presence of HBr and HOOH suggests a radical addition reaction, specifically anti-Markovnikov addition due to the presence of peroxide (HOOH).
Understand the mechanism: In the presence of peroxides, HBr undergoes a radical chain mechanism. The peroxide initiates the formation of bromine radicals.
Determine the regioselectivity: Anti-Markovnikov addition occurs because the bromine radical adds to the less substituted carbon of the alkene, leading to the formation of the more stable radical intermediate.
Predict the product: The bromine radical adds to the less substituted carbon, and the hydrogen from HBr adds to the more substituted carbon, resulting in the formation of a haloalkane.
Consider stereochemistry: Radical reactions often lead to racemic mixtures if the product has chiral centers, due to the planar nature of the radical intermediate.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Haloalkane Synthesis
Haloalkane synthesis involves the formation of alkyl halides through the reaction of alkanes with halogens. In this context, the reaction typically proceeds via a radical mechanism, where the halogen atom replaces a hydrogen atom in the alkane, resulting in the formation of a haloalkane.
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Peroxide Effect
The peroxide effect, also known as the anti-Markovnikov addition, occurs when peroxides are present in the reaction of alkenes with hydrogen halides. This effect leads to the addition of the halogen to the less substituted carbon atom, contrary to the usual Markovnikov rule, due to the formation of free radicals initiated by the peroxide.
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Radical Mechanism
A radical mechanism involves the formation and reaction of free radicals, which are highly reactive species with unpaired electrons. In the presence of peroxides, the reaction of HBr with alkenes proceeds via a radical chain mechanism, where the peroxide initiates the formation of bromine radicals, leading to the anti-Markovnikov addition of HBr.
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Related Practice
Textbook Question
Predict the product of the following haloalkane syntheses.
(a)
1340
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Textbook Question
Classify the following molecules as hydrophilic, hydrophobic, lipophilic, or lipophobic. Each molecule should have two classifications.
(b)
751
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Textbook Question
Predict the product of the following haloalkane syntheses.
(e)
1257
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Textbook Question
Specify the conditions that would allow the synthesis of the 1° and 3° bromoalkanes from the same starting alkene.
1406
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Textbook Question
The most stable intermediate forms first. Explain this statement by showing a reaction coordinate diagram for the formation of a 3° carbocation over a 2° carbocation in the following alkene addition reaction.
1008
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