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
(g)
1135
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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(ii)
Mullins 1st EditionCh. 8 - Alkenes I: Properties and Electrophilic AdditionsProblem 61g(ii)Chapter 7, Problem 61g(ii)
Predict the product(s) that would result when the alkenes shown here are allowed to react under the following conditions:(ii) HCl
(g) 
Verified step by step guidance1
Identify the type of reaction: The reaction of an alkene with HCl is an electrophilic addition reaction. The π-bond in the alkene acts as a nucleophile and reacts with the electrophilic hydrogen (H⁺) from HCl.
Determine the regioselectivity: Use Markovnikov's rule to predict the major product. According to this rule, the hydrogen atom (H⁺) from HCl will add to the carbon of the double bond that has more hydrogen atoms already attached, while the chlorine (Cl⁻) will add to the carbon with fewer hydrogen atoms.
Draw the carbocation intermediate: After the addition of H⁺ to the alkene, a carbocation intermediate is formed. Ensure that the most stable carbocation is formed (tertiary > secondary > primary). If there is a possibility of carbocation rearrangement (e.g., hydride or alkyl shift), consider it to form a more stable carbocation.
Add the nucleophile: The chloride ion (Cl⁻) will attack the positively charged carbocation, forming the final product. Ensure that the product reflects the regioselectivity determined in step 2.
Verify the stereochemistry (if applicable): If the reaction generates a chiral center, consider whether the product will be a racemic mixture or if stereoselectivity is involved. For this reaction, the product is typically not stereoselective unless specific conditions are provided.
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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 HCl, the double bond of the alkene acts as a nucleophile, attacking the electrophilic hydrogen in HCl, leading to the formation of a carbocation intermediate. This process is crucial for predicting the products of alkene reactions.
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Markovnikov's Rule
Markovnikov's Rule states that in the addition of HX (where X is a halogen) to an alkene, the hydrogen atom will attach to the carbon with the greater number of hydrogen atoms already attached. This rule helps predict the major product of the reaction when alkenes react with HCl, guiding the placement of the halide in the final product.
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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. The stability of a carbocation is influenced by factors such as the degree of substitution (primary, secondary, tertiary) and resonance. Understanding carbocation stability is essential for predicting the outcome of reactions involving alkenes and HCl, as more stable carbocations are favored in the reaction pathway.
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Related Practice
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Predict the product(s) that would result when the alkenes shown here are allowed to react under the following conditions: (i) HBr
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