Textbook Question
What stereoisomers do the following reactions form?
b.
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Ch. 10 - Reactions of Alcohols, Ethers, Epoxides, Amines, and Sulfur-Containing Compounds
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. 10 - Reactions of Alcohols, Ethers, Epoxides, Amines, and Sulfur-Containing CompoundsProblem 11c
Bruice 8th EditionCh. 10 - Reactions of Alcohols, Ethers, Epoxides, Amines, and Sulfur-Containing CompoundsProblem 11cChapter 11, Problem 11c
What stereoisomers do the following reactions form?
c. 
Verified step by step guidance1
Step 1: Analyze the starting material. The given compound is a cyclobutane ring with an alcohol (-OH) group attached to one of the carbons. The stereochemistry of the alcohol group is shown as a wedge, indicating it is above the plane of the ring.
Step 2: Examine the first reaction step. Thionyl chloride (SOCl₂) in the presence of pyridine is used to convert the alcohol group into a chloride (-Cl) group. This reaction proceeds via an SN2 mechanism, which inverts the stereochemistry of the substituent. Therefore, the chloride group will be below the plane of the ring (dash).
Step 3: Consider the second reaction step. Ethoxide ion (C₂H₅O⁻) acts as a nucleophile and performs an SN2 substitution on the alkyl chloride. Since SN2 reactions also invert stereochemistry, the ethoxy group (-OCH₂CH₃) will replace the chloride and end up above the plane of the ring (wedge).
Step 4: Determine the stereoisomer formed. The final product will have the ethoxy group (-OCH₂CH₃) above the plane of the cyclobutane ring, maintaining the stereochemical inversion from the first step and the second step.
Step 5: Summarize the stereochemical outcome. The reaction sequence results in a stereoisomer where the ethoxy group is in the same stereochemical position as the original alcohol group (above the plane of the ring), due to two consecutive inversions of stereochemistry.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Stereoisomerism
Stereoisomerism refers to the phenomenon where compounds have the same molecular formula and connectivity of atoms but differ in the spatial arrangement of their atoms. This can lead to different physical and chemical properties. The two main types of stereoisomers are enantiomers, which are non-superimposable mirror images, and diastereomers, which are not mirror images of each other.
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Substitution Reactions
Substitution reactions involve the replacement of one functional group in a molecule with another. In the context of the provided reaction, thionyl chloride (SOCl2) is used to convert an alcohol into a better leaving group, facilitating the substitution by the nucleophile (C2H5O−). Understanding the mechanism of these reactions is crucial for predicting the stereochemical outcomes.
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Nucleophilic Attack and Stereochemistry
In nucleophilic substitution reactions, the nucleophile attacks the electrophilic carbon, leading to the formation of new bonds. The stereochemistry of the product depends on whether the reaction proceeds via an SN1 or SN2 mechanism. SN2 reactions are characterized by a backside attack, resulting in inversion of configuration, while SN1 reactions can lead to racemization due to the formation of a planar carbocation intermediate.
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Related Practice
Textbook Question
Show how 1-propanol can be converted into the following compounds by means of a sulfonate ester:
a. CH3CH2CH2SCH2CH3
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Textbook Question
Show how 1-propanol can be converted into the following compounds by means of a sulfonate ester:
b.
Textbook Question
What stereoisomers do the following reactions form?
a.
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Textbook Question
What stereoisomers do the following reactions form?
d.
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Textbook Question
Fill in each box with the appropriate reagent:b.
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