Textbook Question
What stereoisomers are obtained when (S)-3-methyl-1-pentene reacts with Cl2?
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Ch. 6 - The Reactions of Alkenes • The Stereochemistry of Addition Reactions
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. 6 - The Reactions of Alkenes • The Stereochemistry of Addition ReactionsProblem 99
Bruice 8th EditionCh. 6 - The Reactions of Alkenes • The Stereochemistry of Addition ReactionsProblem 99Chapter 7, Problem 99
When fumarate reacts with D2O in the presence of the enzyme fumarase, only one isomer of the product is formed, as shown here. Is the enzyme catalyzing a syn or an anti addition of D2O?
Verified step by step guidance1
Step 1: Analyze the structure of fumarate, which is a trans-alkene with two carboxylate groups (-COO⁻) and two hydrogens attached to the double bond. The trans configuration means the substituents on the double bond are on opposite sides.
Step 2: Observe the product structure. The addition of D2O results in the formation of a single isomer where the deuterium (D) and hydroxyl (OH) groups are added to the carbons of the former double bond. Both D and OH are added to the same face of the molecule.
Step 3: Recall the difference between syn and anti addition. Syn addition occurs when both groups are added to the same face of the double bond, while anti addition occurs when the groups are added to opposite faces.
Step 4: Based on the product structure, where both D and OH are added to the same face, the reaction catalyzed by fumarase is a syn addition of D2O.
Step 5: Conclude that the enzyme fumarase specifically catalyzes a stereospecific syn addition of D2O to fumarate, resulting in the observed single isomer product.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Fumarate and Fumarase
Fumarate is a dicarboxylic acid and an important intermediate in the citric acid cycle. Fumarase is an enzyme that catalyzes the reversible hydration of fumarate to malate. Understanding the structure of fumarate and the role of fumarase is crucial for analyzing how the enzyme facilitates the addition of water (D2O) to fumarate.
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The Citric Acid Cycle Example 5
Addition Reactions
Addition reactions involve the addition of atoms or groups to a molecule, typically across a double bond. In the context of fumarate reacting with D2O, it is important to determine whether the addition occurs in a syn (same side) or anti (opposite sides) manner, as this affects the stereochemistry of the product formed.
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Stereochemistry
Stereochemistry is the study of the spatial arrangement of atoms in molecules and how this affects their chemical behavior. In the case of fumarate and D2O, understanding whether the enzyme catalyzes a syn or anti addition is essential for predicting the stereochemical outcome of the reaction and the specific isomer produced.
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Related Practice
Textbook Question
a. Propose a mechanism for the following reaction:
b. Is the initially formed carbocation primary, secondary, or tertiary?
c. Is the rearranged carbocation primary, secondary, or tertiary?
d. Why does the rearrangement occur?
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Textbook Question
Propose a mechanism for the following reaction:
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Textbook Question
Which compound is hydrated more rapidly?
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Textbook Question
What hydrocarbon forms the following products after reaction first with ozone and then with dimethyl sulfide?
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Textbook Question
When the following compound is hydrated in the presence of acid, the unreacted alkene is found to have retained the deuterium atoms. What does this tell you about the mechanism for hydration?
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