Domanda del libro di testo
Predict the product(s) of the following substitution or elimination reactions, paying close attention to the stereochemical outcome of the reactions.
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Ch. 12 - Substitution and Elimination: Reactions of Haloalkanes
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. 12 - Substitution and Elimination: Reactions of HaloalkanesProblema 57c
Mullins 1st EditionCh. 12 - Substitution and Elimination: Reactions of HaloalkanesProblema 57cCapitolo 11, Problema 57c
For each pair, choose the nucleophile that would react most quickly in an SN2 reaction (assume H2O is the solvent).
(c) 
Guida verificata passo dopo passo1
Step 1: Recall the key factors that influence nucleophilicity in an SN2 reaction. Nucleophilicity depends on the ability of a nucleophile to donate electrons, which is influenced by charge, electronegativity, and polarizability.
Step 2: Compare the electronegativity of oxygen (O) and sulfur (S). Oxygen is more electronegative than sulfur, meaning it holds onto its electrons more tightly, making sulfur a better nucleophile in terms of electron donation.
Step 3: Consider polarizability. Sulfur is larger and more polarizable than oxygen, which allows it to form a stronger interaction with the electrophile during the SN2 reaction. This makes sulfur a faster nucleophile in SN2 reactions.
Step 4: Evaluate the solvent effect. In H2O (a polar protic solvent), nucleophiles with lower electronegativity and higher polarizability, like sulfur, are less hindered by solvation and react more quickly.
Step 5: Conclude that the nucleophile with the sulfur atom (S⁻) will react more quickly in an SN2 reaction compared to the nucleophile with the oxygen atom (O⁻).
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Nucleophilicity
Nucleophilicity refers to the ability of a species to donate an electron pair to an electrophile, forming a chemical bond. In Sₙ2 reactions, stronger nucleophiles react more quickly due to their higher electron density and better ability to stabilize the transition state. Factors influencing nucleophilicity include charge, electronegativity, and solvent effects.
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08:27
Nucleophilic Addition
Sₙ2 Mechanism
The Sₙ2 (substitution nucleophilic bimolecular) mechanism involves a single concerted step where the nucleophile attacks the electrophile while simultaneously displacing a leaving group. This reaction is characterized by a backside attack, leading to inversion of configuration at the chiral center. The rate of the reaction depends on both the nucleophile and the substrate.
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04:32General Mechanism
Solvent Effects
The choice of solvent can significantly influence the rate of Sₙ2 reactions. Polar aprotic solvents, like acetone or DMSO, enhance nucleophilicity by stabilizing the nucleophile without solvation, allowing for faster reactions. In contrast, polar protic solvents, such as water, can hinder nucleophilicity by forming hydrogen bonds with the nucleophile, thus slowing the reaction.
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01:16Identification of polarity in solvents
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