Textbook Question
What is the major product of the reaction of 2-methyl-2-butene with each of the following reagents?
f. MCPBA (a peroxyacid)
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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 58d
Bruice 8th EditionCh. 6 - The Reactions of Alkenes • The Stereochemistry of Addition ReactionsProblem 58dChapter 7, Problem 58d
What is the major product of the reaction of 2-methyl-2-butene with each of the following reagents?
d. O3, −78 °C, followed by (CH3)2S
Verified step by step guidance1
Step 1: Recognize the reaction type. The reaction involves ozonolysis, which is a process where ozone (O3) cleaves the double bond of an alkene, breaking it into two carbonyl compounds (aldehydes or ketones). The second reagent, (CH3)2S (dimethyl sulfide), is a reducing agent that prevents the formation of carboxylic acids or further oxidation.
Step 2: Identify the structure of the starting material. The given compound is 2-methyl-2-butene, which is a branched alkene with the structure: CH3-C(CH3)=CH-CH3. The double bond is between the second and third carbon atoms.
Step 3: Predict the cleavage of the double bond. During ozonolysis, the double bond is cleaved, and each carbon atom of the double bond is converted into a carbonyl group. This means the molecule will split into two fragments, each containing a carbonyl group.
Step 4: Assign the resulting fragments. After cleavage, the two fragments are: (1) a ketone (CH3-C=O) from the more substituted carbon of the double bond, and (2) an aldehyde (CH3-CH2-CHO) from the less substituted carbon of the double bond. The reducing agent (CH3)2S ensures that the aldehyde remains in its reduced form and does not oxidize further.
Step 5: Combine the information to determine the major products. The major products of this reaction are acetone (CH3-C=O-CH3) and propanal (CH3-CH2-CHO), which result from the cleavage of the double bond in 2-methyl-2-butene followed by reduction with (CH3)2S.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Ozonolysis
Ozonolysis is a reaction involving the cleavage of alkenes using ozone (O3) to form carbonyl compounds. In this process, the alkene reacts with ozone to form a molozonide, which rearranges to yield ozonides. These ozonides can then be reduced, typically with a reagent like dimethyl sulfide ((CH3)2S), to produce aldehydes or ketones, depending on the structure of the original alkene.
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General properties of ozonolysis.
Reactivity of Alkenes
Alkenes are hydrocarbons that contain at least one carbon-carbon double bond, making them reactive due to the presence of π bonds. The reactivity of alkenes allows them to undergo various addition reactions, including electrophilic additions and ozonolysis. The structure and substitution pattern of the alkene influence the stability of intermediates and the final products formed during these reactions.
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Product Determination
Determining the major product of a reaction involves analyzing the stability of potential products and the mechanism of the reaction. In ozonolysis, the major products are typically the most stable carbonyl compounds formed from the cleavage of the double bond. Understanding the regioselectivity and stereochemistry of the reaction is crucial for predicting the correct major product.
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Related Practice
Textbook Question
What is the major product of the reaction of 2-methyl-2-butene with each of the following reagents?
b. HI
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Textbook Question
What is the major product of the reaction of 2-methyl-2-butene with each of the following reagents?
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Textbook Question
Identify the electrophile and the nucleophile in each of the following reaction steps and then draw curved arrows to illustrate the bond-making and bondbreaking processes.
c.
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Textbook Question
What is the major product of the reaction of 2-methyl-2-butene with each of the following reagents?
j. Br2/CH3OH
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Textbook Question
What is the major product of the reaction of 2-methyl-2-butene with each of the following reagents?
g. H2O + H2SO4
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