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)
2
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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 58g
Bruice 8th EditionCh. 6 - The Reactions of Alkenes • The Stereochemistry of Addition ReactionsProblem 58gChapter 7, Problem 58g
What is the major product of the reaction of 2-methyl-2-butene with each of the following reagents?
g. H2O + H2SO4
Verified step by step guidance1
Step 1: Recognize the type of reaction. The addition of H2O in the presence of H2SO4 is an example of acid-catalyzed hydration, which follows Markovnikov's rule.
Step 2: Identify the structure of the starting material, 2-methyl-2-butene. It is an alkene with a double bond between the second and third carbons, and a methyl group attached to the second carbon.
Step 3: Understand the mechanism. The reaction begins with the protonation of the double bond by H2SO4, forming a carbocation intermediate. The more stable carbocation will form, which is the tertiary carbocation at the second carbon due to the presence of the methyl group.
Step 4: Water (H2O) acts as a nucleophile and attacks the carbocation, leading to the formation of an oxonium ion. This step adds the -OH group to the carbon with the carbocation.
Step 5: Deprotonation of the oxonium ion occurs, resulting in the final product. The major product will be 2-methyl-2-butanol, as the -OH group is added to the more substituted carbon (Markovnikov's rule).
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Electrophilic Addition
Electrophilic addition is a fundamental reaction mechanism in organic chemistry where an electrophile reacts with a nucleophile, typically involving alkenes. In the case of 2-methyl-2-butene, the double bond acts as a nucleophile, attacking an electrophile, which leads to the formation of a more stable carbocation intermediate. This mechanism is crucial for understanding how alkenes react with various reagents.
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1,2 vs 1,4 Addition
Markovnikov's Rule
Markovnikov's Rule states that in the addition of HX to an alkene, the hydrogen atom will attach to the carbon with the greater number of hydrogen atoms already attached. This principle helps predict the regioselectivity of the reaction products. In the reaction of 2-methyl-2-butene with H2O in the presence of H2SO4, this rule guides the formation of the major product by determining where the hydroxyl group will be added.
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Carbocation Stability
Carbocation stability is a key concept in organic chemistry that refers to the relative stability of positively charged carbon species. Tertiary carbocations are more stable than secondary or primary ones due to hyperconjugation and inductive effects from surrounding alkyl groups. In the reaction of 2-methyl-2-butene, the formation of a more stable tertiary carbocation intermediate is favored, influencing the final product of the reaction.
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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
2
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Textbook Question
Give two names for each of the following:
1
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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?
d. O3, −78 °C, followed by (CH3)2S
Textbook Question
What is the major product of the reaction of 2-methyl-2-butene with each of the following reagents?
j. Br2/CH3OH
2
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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?
k. BH3/THF, followed by H2O2, HO- , H2O
5
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