Textbook Question
Predict the product(s) that would result when the alkenes shown here are allowed to react under the following conditions: (iii) HBr, H2O2
(g)
1
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Ch. 8 - Alkenes I: Properties and Electrophilic Additions
Mullins1st EditionOrganic Chemistry: A Learner Centered ApproachISBN: 9780137566471
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Table of contents
- Ch. 2 - General Chemistry Translated: Finding the Electrons114
- Ch. 3 - Alkanes and Cycloalkanes: Properties and Conformational Analysis109
- Ch. 4 - Acids and Bases: Electron Flow144
- Ch. 5 - Chemical Reaction Analysis: Thermodynamics and Kinetics118
- Ch. 6 - Stereoisomerism: Arrangement of Atoms in Space112
- Ch. 7 - Principles of Green (Organic) Chemistry3
- Ch. 8 - Alkenes I: Properties and Electrophilic Additions158
- Ch. 9 - Alkenes II: Oxidation and Reduction150
- Ch. 10 - Alkynes: Electrophilic Addition and Redox Reactions101
- Ch. 11 - Properties and Synthesis of Alkyl Halides: Radical Reactions108
- Ch. 12 - Substitution and Elimination: Reactions of Haloalkanes172
- Ch. 13 - Alcohols, Ethers and Related Compounds: Substitution and Elimination239
- Ch. 14 - Structural Identification I: Infrared Spectroscopy and Mass Spectrometry54
- Ch. 15 - Structural Identification II: Nuclear Magnetic Resonance Spectroscopy93
- Ch. 16 - Metals in Organic Chemistry48
- Ch. 17 - Carbonyl Addition Reactions: Aldehydes and Ketones45
- Ch. 18 - Nucleophilic Acyl Substitution I: Carboxylic Acids18
- Ch. 19 - Nucleophilic Acyl Substitution II: Carboxylic Acid Derivatives39
- Ch. 20 - Enolates: Carbonyl Addition and Substitution13
- Ch. 21 - Conjugated Systems I: Stability and Addition Reactions56
- Ch. 22 - Conjugated Systems II: Pericyclic Reactions54
- Ch. 23 - Benzene I: Aromatic Stability and Substitution Reactions64
- Ch. 24 - Benzene II: Reactions Influenced by the Aromatic Ring62
- Ch. 25 - Amines: Structure, Reactions, and Synthesis27
- Ch. 26 - Amino Acids, Proteins, and Peptide Synthesis9
- Ch. 27 - Carbohydrates, Nucleic Acids, and Lipids54
Mullins1st EditionOrganic Chemistry: A Learner Centered ApproachISBN: 9780137566471Not the one you use?Change textbook
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Mullins 1st EditionCh. 8 - Alkenes I: Properties and Electrophilic AdditionsProblem 61g(iv)
Mullins 1st EditionCh. 8 - Alkenes I: Properties and Electrophilic AdditionsProblem 61g(iv)Chapter 7, Problem 61g(iv)
Predict the product(s) that would result when the alkenes shown here are allowed to react under the following conditions: (iv) H2SO4 , H2O
(g) 
Verified step by step guidance1
Step 1: Identify the type of reaction. The given reagents, H₂SO₄ (sulfuric acid) and H₂O (water), indicate that the reaction is an acid-catalyzed hydration of an alkene. This reaction adds water (H and OH) across the double bond of the alkene.
Step 2: Determine the regioselectivity of the reaction. Acid-catalyzed hydration follows Markovnikov's rule, meaning the hydrogen (H) will add to the carbon of the double bond that already has more hydrogens, and the hydroxyl group (OH) will add to the carbon with fewer hydrogens.
Step 3: Consider the mechanism. The reaction proceeds via the formation of a carbocation intermediate. The alkene's π electrons attack the proton (H⁺) from H₂SO₄, forming a carbocation at the more stable position (tertiary > secondary > primary).
Step 4: Add the hydroxyl group. Once the carbocation is formed, water (H₂O) acts as a nucleophile and attacks the carbocation, forming an oxonium ion. This intermediate is then deprotonated to yield the final alcohol product.
Step 5: Predict the product structure. Based on the alkene's structure and the application of Markovnikov's rule, draw the product where the OH group is attached to the more substituted carbon of the original double bond, and the H is attached to the less substituted carbon.
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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 presence of strong acids like H₂SO₄, the alkene's double bond acts as a nucleophile, attacking the electrophilic hydrogen, leading to the formation of a carbocation intermediate. This step is crucial for predicting the products of reactions involving alkenes.
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Carbocation Stability
Carbocation stability is a key concept in understanding the outcomes of reactions involving electrophilic addition. Carbocations are positively charged species that can vary in stability based on their structure; tertiary carbocations are more stable than secondary or primary ones due to hyperconjugation and inductive effects. The stability of the carbocation formed during the reaction influences the final product distribution.
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Hydration Reaction
The hydration reaction refers to the addition of water (H₂O) to an alkene, resulting in the formation of an alcohol. Under acidic conditions, such as with H₂SO₄, the alkene first forms a carbocation, which then reacts with water to yield the alcohol product. This process is essential for converting alkenes into alcohols and is a common transformation in organic synthesis.
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Related Practice
Textbook Question
Predict the product(s) that would result when the alkenes shown here are allowed to react under the following conditions: (vi) 1. BH3 2. H2O2, NaOH
(k)
5
views
Textbook Question
Predict the product(s) that would result when the alkenes shown here are allowed to react under the following conditions: (vi) 1. BH3 2. H2O2, NaOH
(g)
1
views
Textbook Question
Predict the product(s) that would result when the alkenes shown here are allowed to react under the following conditions: (i) HBr
(k)
1
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Textbook Question
Predict the product(s) that would result when the alkenes shown here are allowed to react under the following conditions: (v) 1. Hg(OAc)2 , H2O 2. NaBH4
(k)
5
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Textbook Question
Predict the product(s) that would result when the alkenes shown here are allowed to react under the following conditions: (i) HBr
(g)
1
views