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)
1287
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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 61k(v)
Mullins 1st EditionCh. 8 - Alkenes I: Properties and Electrophilic AdditionsProblem 61k(v)Chapter 7, Problem 61k(v)
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) 
Verified step by step guidance1
Identify the reaction type: The given reagents, Hg(OAc)₂, H₂O followed by NaBH₄, indicate an oxymercuration-demercuration reaction. This reaction is used to hydrate alkenes (add H and OH) without carbocation rearrangement.
Determine the regioselectivity: Oxymercuration-demercuration follows Markovnikov's rule, meaning the OH group will add to the more substituted carbon of the double bond, while the H will add to the less substituted carbon.
Analyze the alkene structure: Examine the position of the double bond in the given alkene. Identify the more substituted carbon (the carbon with more alkyl groups attached) and the less substituted carbon.
Predict the intermediate: In the first step, Hg(OAc)₂ reacts with the alkene to form a mercurinium ion intermediate. Water (H₂O) then attacks the more substituted carbon, leading to the addition of an OH group.
Complete the reaction: In the second step, NaBH₄ reduces the intermediate, replacing the mercury group with a hydrogen atom. The final product is an alcohol with the OH group on the more substituted carbon and the H on 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.
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 reactions involving alkenes, guiding the formation of more stable carbocations during the reaction.
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Oxymercuration-Demercuration
Oxymercuration-Demercuration is a two-step reaction process used to convert alkenes into alcohols. The first step involves the addition of mercuric acetate (Hg(OAc)₂) and water, which forms a mercurial intermediate. The second step, using sodium borohydride (NaBH₄), reduces the intermediate to yield the corresponding alcohol without rearrangement, ensuring the product follows Markovnikov's Rule.
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Hydration of Alkenes
Hydration of alkenes refers to the addition of water across the double bond of an alkene, resulting in the formation of alcohols. This reaction can occur via acid-catalyzed mechanisms or through oxymercuration-demercuration, and it is crucial for synthesizing alcohols from alkenes while maintaining regioselectivity and stereochemistry.
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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: (iii) HBr, H2O2
(k)
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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: (iv) H2SO4 , H2O
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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: (vi) 1. BH3 2. H2O2, NaOH
(g)
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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
(k)
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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:(ii) HCl
(k)
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