Domanda del libro di testo
In the following molecules, identify the carbon where the radical is most likely to form in the first propagation step.
(c)
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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 29
Mullins 1st EditionCh. 11 - Properties and Synthesis of Alkyl Halides: Radical ReactionsProblema 29Capitolo 10, Problema 29
In the following reaction, which C―H bond would be most likely to react with a bromine radical?
Guida verificata passo dopo passo1
Identify the type of reaction: This problem involves a radical halogenation reaction, specifically with bromine radicals. Bromine radicals are selective and prefer to react with the most stable radical intermediates.
Consider the stability of radical intermediates: In radical halogenation, the stability of the radical formed after hydrogen abstraction is crucial. Tertiary radicals are more stable than secondary radicals, which are more stable than primary radicals.
Analyze the structure of the molecule: Examine the molecule to identify the different types of C―H bonds present. Determine which carbon atoms are primary, secondary, or tertiary.
Evaluate the bond dissociation energies: Generally, the C―H bond at a tertiary carbon will have a lower bond dissociation energy compared to secondary or primary C―H bonds, making it more likely to react with a bromine radical.
Select the most likely C―H bond: Based on the stability of the radical intermediates and the bond dissociation energies, choose the C―H bond at the tertiary carbon as the most likely to react with a bromine radical.
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Concetti chiave
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Radical Halogenation
Radical halogenation is a reaction where a halogen, such as bromine, reacts with hydrocarbons to form haloalkanes. The process involves the formation of radicals, which are highly reactive species with unpaired electrons. Understanding the mechanism of radical formation and propagation is crucial for predicting which bonds are likely to react.
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12:11
Radical Chain Reaction Mechanism.
Bond Strength and Reactivity
In radical halogenation, the reactivity of C-H bonds is influenced by their bond strength. Weaker C-H bonds, typically found in tertiary carbons, are more susceptible to radical attack due to lower energy required for bond cleavage. Identifying the weakest C-H bond in a molecule helps predict the site of radical attack.
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06:00Single bonds, double bonds, and triple bonds.
Stability of Radicals
The stability of the resulting radical is a key factor in determining which C-H bond will react. More stable radicals, such as tertiary radicals, are favored due to their ability to better distribute the unpaired electron. This stability is often achieved through hyperconjugation and resonance, making certain C-H bonds more reactive.
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03:43The radical stability trend.
Pratica correlata
Domanda del libro di testo
Identify the allylic carbon(s) in the following molecules.
(c)
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Domanda del libro di testo
Identify the allylic carbon(s) in the following molecules.
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Domanda del libro di testo
In the following molecules, identify the carbon where the radical is most likely to form in the first propagation step.
(d)
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Domanda del libro di testo
In the following allylic radicals, identify the carbon where the new C–Br bond is most likely to form in the second propagation step.
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Domanda del libro di testo
We show in Chapter 12 that C― Br bonds can break to give a carbocation and a bromide anion. For which of the organohalides (A or B) would you expect this process to be fastest? Explain.
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