Textbook Question
A small amount of another organic product is formed in a Williamson ether synthesis. What is this product when the alkyl halide used in the synthesis of butyl propyl ether is
a. propyl bromide?
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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 6c,d
Bruice 8th EditionCh. 9 - Substitution and Elimination Reactions of Alkyl HalidesProblem 6c,dChapter 10, Problem 6c,d
Draw the products obtained from the SN2 reaction of:
c. (S)-3-chlorohexane and hydroxide ion.
d. 3-iodopentane and hydroxide ion.
Verified step by step guidance1
Step 1: Understand the SN2 reaction mechanism. The SN2 reaction is a bimolecular nucleophilic substitution reaction where the nucleophile attacks the electrophilic carbon from the opposite side of the leaving group, leading to an inversion of configuration at the carbon center.
Step 2: For part (c), identify the substrate and nucleophile. The substrate is (S)-3-chlorohexane, which has a chiral center at carbon-3. The nucleophile is the hydroxide ion (OH⁻), and the leaving group is the chloride ion (Cl⁻).
Step 3: Predict the stereochemical outcome for part (c). Since the SN2 reaction proceeds with inversion of configuration, the product will have the opposite configuration at the chiral center. The product will be (R)-3-hexanol, where the hydroxide ion replaces the chloride ion.
Step 4: For part (d), identify the substrate and nucleophile. The substrate is 3-iodopentane, which does not have a chiral center. The nucleophile is the hydroxide ion (OH⁻), and the leaving group is the iodide ion (I⁻).
Step 5: Predict the product for part (d). Since there is no chiral center, the SN2 reaction will simply result in the substitution of the iodide ion with the hydroxide ion, forming 3-pentanol as the product.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
SN2 Reaction Mechanism
The SN2 (substitution nucleophilic bimolecular) reaction is a type of nucleophilic substitution where a nucleophile attacks an electrophile, resulting in the simultaneous displacement of a leaving group. This mechanism involves a single concerted step, leading to the formation of a transition state where both the nucleophile and the leaving group are partially bonded to the carbon atom. The reaction typically occurs with primary or secondary substrates due to steric hindrance.
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Stereochemistry in SN2 Reactions
Stereochemistry plays a crucial role in SN2 reactions, as the nucleophile attacks the electrophile from the opposite side of the leaving group, leading to an inversion of configuration at the chiral center. This means that if the starting material is chiral, the product will have the opposite configuration. Understanding this inversion is essential for predicting the stereochemical outcome of reactions involving chiral substrates.
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Nucleophilicity and Leaving Groups
Nucleophilicity refers to the ability of a species to donate an electron pair to form a new bond, while leaving groups are atoms or groups that can depart with a pair of electrons during a reaction. In SN2 reactions, strong nucleophiles, such as hydroxide ions, effectively attack the electrophile, while good leaving groups, like chloride or iodide ions, facilitate the reaction by stabilizing the transition state. The strength of both factors significantly influences the reaction rate and product formation.
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Related Practice
Textbook Question
Which alkyl halide is more reactive in an SN2 reaction with a given nucleophile?
a.
b.
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Textbook Question
A small amount of another organic product is formed in a Williamson ether synthesis. What is this product when the alkyl halide used in the synthesis of butyl propyl ether is
b. butyl bromide?
1
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Textbook Question
Draw the substitution product formed by each of the following SN2 reactions:
a. trans-1-iodo-4-ethylcyclohexane and methoxide ion
b. cis-1-chloro-3-methylcyclobutane and ethoxide ion
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Textbook Question
Rank the following alkyl bromides from most reactive to least reactive in an SN2 reaction:
1-bromo-2-methylbutane, 1-bromo-3-methylbutane, 2-bromo-2-methylbutane, and 1-bromopentane.
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Textbook Question
Which alkyl halide is more reactive in an SN2 reaction with a given nucleophile?
c.
d.
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