Domanda del libro di testo
Predict the product of the following benzylic bromination reactions.
(b)
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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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TOC.tableOfContents
- 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 1: Properties and Electrophilic Additions158
- Ch. 9 - Alkenes 2: 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 1: Infrared Spectroscopy and Mass Spectrometry54
- Ch. 15 - Structural Identification 2: Nuclear Magnetic Resonance Spectroscopy93
- Ch. 16 - Metals in Organic Chemistry48
- Ch. 17 - Carbonyl Addition Reactions: Aldehydes and Ketones45
- Ch. 18 - Nucleophilic Acyl Substitution 1: Carboxylic Acids18
- Ch. 19 - Nucleophilic Acyl Substitution 2: Carboxylic Acid Derivatives39
- Ch. 20 - Enolates: Carbonyl Addition and Substitution13
- Ch. 21 - Conjugated Systems 1: Stability and Addition Reactions56
- Ch. 22 - Conjugated Systems 2: Pericyclic Reactions54
- Ch. 23 - Benzene 1: Aromatic Stability and Substitution Reactions64
- Ch. 24 - Benzene 2: 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: 9780137566471Non è quello che usi tu?Cambia libro di testo
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Mullins 1st EditionCh. 11 - Properties and Synthesis of Alkyl Halides: Radical ReactionsProblema 63c
Mullins 1st EditionCh. 11 - Properties and Synthesis of Alkyl Halides: Radical ReactionsProblema 63cCapitolo 10, Problema 63c
Predict the product of the following benzylic bromination reactions.
(c) 
Guida verificata passo dopo passo1
Identify the type of reaction: This is a benzylic bromination reaction, which typically involves the substitution of a hydrogen atom at the benzylic position with a bromine atom.
Locate the benzylic position: The benzylic position is the carbon atom directly attached to the benzene ring. In this case, identify the carbon atom that is adjacent to the benzene ring.
Consider the mechanism: Benzylic bromination usually proceeds via a radical mechanism. The presence of a benzene ring stabilizes the radical intermediate, making the benzylic position more reactive.
Initiate the reaction: The reaction is typically initiated by a radical initiator, such as N-bromosuccinimide (NBS) in the presence of light or heat, which generates bromine radicals.
Predict the product: The bromine radical will abstract a hydrogen atom from the benzylic position, forming a benzylic radical. This radical will then react with another bromine molecule to form the brominated product at the benzylic position.
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Benzylic Bromination
Benzylic bromination is a type of radical halogenation reaction where a bromine atom is introduced at the benzylic position of an aromatic compound. This position is adjacent to the aromatic ring, and the reaction typically involves the use of N-bromosuccinimide (NBS) in the presence of a radical initiator like light or heat. The benzylic position is particularly reactive due to the stability of the benzylic radical formed during the reaction.
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Mechanism of Allylic Bromination.
Radical Mechanism
Radical mechanisms involve the formation and reaction of radicals, which are species with unpaired electrons. In benzylic bromination, the process begins with the generation of a bromine radical, which abstracts a hydrogen atom from the benzylic position, forming a benzylic radical. This radical then reacts with another bromine molecule to form the brominated product. Understanding radical stability and propagation steps is crucial for predicting the outcome of such reactions.
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03:28The mechanism of Radical Polymerization.
Stability of Benzylic Radicals
The stability of benzylic radicals is a key factor in benzylic bromination reactions. Benzylic radicals are stabilized by resonance, as the unpaired electron can be delocalized over the aromatic ring. This resonance stabilization makes the benzylic position more reactive compared to other positions on the aromatic ring, facilitating the formation of the radical and subsequent bromination. Recognizing this stability helps in predicting the preferred site of bromination in complex molecules.
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03:43The radical stability trend.
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(a)
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