Textbook Question
Draw the product of each of the following reactions:
2.
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Ch. 9 - Substitution and Elimination Reactions of Alkyl Halides
Bruice8th EditionOrganic ChemistryISBN: 9780135213711
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Table of contents
- Ch. 1 - Remembering General Chemistry: Electronic Structure and Bonding (Part 1)31
- Ch. 1 - Remembering General Chemistry: Electronic Structure and Bonding (Part 2)65
- Ch. 2 - Acids and Bases: Central to Understanding Organic Chemistry84
- Ch. 3 - An Introduction to Organic Compounds:Nomenclature, Physical Properties, and Structure183
- Ch. 4 - Isomers: The Arrangement of Atoms in Space121
- Ch. 5 - Alkenes: Structure, Nomenclature, and an Introduction to Reactivity • Thermodynamics and Kinetics83
- Ch. 6 - The Reactions of Alkenes • The Stereochemistry of Addition Reactions175
- Ch. 7 - The Reactions of Alkynes • An Introduction to Multistep Synthesis119
- Ch. 8 - Delocalized Electrons: Their Effect on Stability, pKa, and the Products of a Reaction • Aromaticity and Electronic Effects: An Introduction to the Reactions of Benzene148
- Ch. 9 - Substitution and Elimination Reactions of Alkyl Halides212
- Ch. 10 - Reactions of Alcohols, Ethers, Epoxides, Amines, and Sulfur-Containing Compounds131
- Ch. 11 - Organometallic Compounds60
- Ch. 12 - Radicals90
- Ch. 13 - Mass Spectrometry; Infrared Spectroscopy; UV/Vis Spectroscopy62
- Ch. 14 - NMR Spectroscopy95
- Ch. 15 - Reactions of Carboxylic Acids and Carboxylic Acid Derivatives123
- Ch. 16 - Reactions of Aldehydes and Ketones • More Reactions of Carboxylic Acid Derivatives141
- Ch. 17 - Reactions at the Alpha-Carbon101
- Ch. 18 - Reactions of Benzene and Substituted Benzenes144
- Ch. 19 - More About Amines • Reactions of Heterocyclic Compounds49
- Ch. 20 - The Organic Chemistry of Carbohydrates80
- Ch. 21 - Amino Acids, Peptides, and Proteins57
- Ch. 22 - Catalysis in Organic Reactions and in Enzymatic Reactions35
- Ch. 23 - The Organic Chemistry of the Coenzymes—Compounds Derived from Vitamins1
- Ch. 28 - Pericyclic Reactions58
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Bruice 8th EditionCh. 9 - Substitution and Elimination Reactions of Alkyl HalidesProblem 121
Bruice 8th EditionCh. 9 - Substitution and Elimination Reactions of Alkyl HalidesProblem 121Chapter 10, Problem 121
Propose a mechanism for the following reaction:
Verified step by step guidance1
Step 1: Analyze the reactants and products. The starting material is a tertiary alkyl chloride, and the product is an ether. The reaction occurs in ethanol (C₂H₅OH), which suggests that ethanol acts as both the solvent and the nucleophile.
Step 2: Recognize the reaction type. This is likely an SN1 reaction because the substrate is a tertiary alkyl chloride, which favors the formation of a stable carbocation intermediate.
Step 3: Initiate the mechanism. The reaction begins with the dissociation of the C-Cl bond in the tertiary alkyl chloride, forming a carbocation intermediate. This step is facilitated by the polar protic solvent ethanol.
Step 4: Nucleophilic attack. The ethanol molecule (C₂H₅OH) acts as the nucleophile and attacks the carbocation, forming a new bond between the oxygen atom of ethanol and the carbon atom of the carbocation.
Step 5: Proton transfer. The positively charged oxygen atom in the intermediate loses a proton (H⁺) to another ethanol molecule or the solvent, resulting in the formation of the ether product.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Nucleophilic Substitution Reactions
Nucleophilic substitution reactions involve the replacement of a leaving group (like Cl) by a nucleophile (like ethyl alcohol). In this process, the nucleophile donates a pair of electrons to form a new bond, while the leaving group departs with its electrons. Understanding the mechanism, whether it follows an SN1 or SN2 pathway, is crucial for predicting the outcome of the reaction.
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Nucleophiles and Electrophiles can react in Substitution Reactions.
Mechanism of SN2 Reactions
In an SN2 reaction, the nucleophile attacks the electrophilic carbon atom from the opposite side of the leaving group, leading to a concerted mechanism where bond formation and bond breaking occur simultaneously. This results in an inversion of configuration at the carbon center. Recognizing the stereochemical implications is important for understanding the product's structure.
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08:33Drawing the SN2 Mechanism
Role of Solvents in Organic Reactions
The choice of solvent can significantly influence the rate and outcome of organic reactions. Polar protic solvents can stabilize ions and facilitate SN1 mechanisms, while polar aprotic solvents favor SN2 reactions by enhancing nucleophilicity. In this reaction, the presence of ethyl alcohol as a solvent and nucleophile suggests a potential for an SN2 mechanism, impacting the reaction dynamics.
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02:26General format of reactions and how to interpret solvents.
Related Practice
Textbook Question
The reaction of an alkyl chloride with potassium iodide is generally carried out in acetone to maximize the amount of alkyl iodide that is formed. Why does the solvent increase the yield of alkyl iodide? (Hint: Potassium iodide is soluble in acetone, but potassium chloride is not.)
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Textbook Question
Propose a mechanism for the following reaction.
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Textbook Question
Give two sets of reactants (each set including an alkyl halide and a nucleophile) that could be used to synthesize the following ether:
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Textbook Question
Give two sets of reactants (each set including an alkyl halide and a nucleophile) that could be used to synthesize the following alkyne:
CH3CH2C≡CCH2CH2CH2CH3
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Textbook Question
Explain why tetrahydrofuran can solvate a positively charged species better than diethyl ether can.
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