Textbook Question
Rank the reactivity of the following alkenes with mCPBA ( 1 = most reactive , 5 least reactive ).
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Ch. 9 - Alkenes II: Oxidation and Reduction
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
Chapter 8, Problem 45l(vii,viii)
Predict the product(s) that would result when the alkenes are allowed to react under the following conditions: (vii) 1. mCPBA 2. H2SO4, H2O (viii) 1. O3 2. CH3SCH3
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Verified step by step guidance1
Step 1: Analyze the structure of the given alkene. The molecule contains a double bond, which is the reactive site for the reactions described in the problem.
Step 2: For reaction (vii), mCPBA (meta-chloroperoxybenzoic acid) is a reagent used for epoxidation. This reaction will convert the double bond into an epoxide by adding an oxygen atom across the double bond. The stereochemistry of the epoxide will depend on the approach of the mCPBA.
Step 3: For reaction (viii), the sequence involves ozonolysis followed by reduction with dimethyl sulfide (CH₃SCH₃). Ozonolysis cleaves the double bond, forming two carbonyl compounds (aldehydes or ketones) depending on the substituents attached to the double bond.
Step 4: Apply the ozonolysis mechanism to the given alkene. Break the double bond and add oxygen atoms to each carbon of the double bond to form two carbonyl groups. Use the structure of the alkene to determine the specific aldehydes or ketones formed.
Step 5: Combine the results of both reactions. For (vii), the product is an epoxide. For (viii), the products are carbonyl compounds resulting from the cleavage of the double bond. Ensure the stereochemistry and connectivity of the products are consistent with the starting material.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Epoxidation
Epoxidation is a reaction where an alkene is converted into an epoxide, a three-membered cyclic ether. This transformation typically occurs using peracids, such as mCPBA (meta-chloroperbenzoic acid), which adds an oxygen atom across the double bond of the alkene. Understanding this reaction is crucial for predicting the products when alkenes react with mCPBA.
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02:19
General properties of epoxidation.
Ozonolysis
Ozonolysis is a reaction involving the cleavage of alkenes using ozone (O₃), resulting in the formation of carbonyl compounds, such as aldehydes or ketones. The reaction proceeds through the formation of an ozonide intermediate, which is then reduced, often using a reagent like dimethyl sulfide (CH₃SCH₃). This concept is essential for predicting the products when alkenes are treated with ozone followed by a reductive workup.
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06:30General properties of ozonolysis.
Mechanism of Electrophilic Addition
The mechanism of electrophilic addition describes how alkenes react with electrophiles, leading to the formation of more stable products. In the case of epoxidation and ozonolysis, understanding the stepwise addition of reagents to the double bond is key to predicting the final products. This concept encompasses the reactivity of alkenes and the nature of the intermediates formed during these reactions.
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05:39Features of Addition Mechanisms.
Related Practice
Textbook Question
When alkenes react with bromine in water, a halohydrin is produced. When water is replaced with methanol in this reaction, a different product is produced. Suggest a mechanism for the formation of this product.
Textbook Question
Predict the product(s) that would result when the alkenes are allowed to react under the following conditions: (ix) H2, Pd/C; and (x) D2, Pd/C.
(l)
Textbook Question
Predict the product(s) that would result when the alkenes are allowed to react under the following conditions: (i) Br2 (ii) Cl2
(l)
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Textbook Question
Predict the product(s) that would result when the alkenes are allowed to react under the following conditions: (iii) Br2, H2O ; (iv) Cl2, CH3OH;
(l)
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Textbook Question
Predict the product(s) that would result when the alkenes are allowed to react under the following conditions: (v) mCPBA; (vi) 1. OsO4 2. NaHSO3
(l)
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