Textbook Question
Predict the major products of the following reactions, and give the structures of any intermediates. Include stereochemistry where appropriate.
(q)
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Ch.8 - Reactions of Alkenes
Wade9th EditionOrganic ChemistryISBN: 9780135213728
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Table of contents
- Ch.1 - Structure and Bonding107
- Ch. 2 - Acids and Bases; Functional Groups115
- Ch.3 - Structure and Stereochemistry of Alkanes100
- Ch.4 - The Study of Chemical Reactions99
- Ch.5 - Stereochemistry93
- Ch.6 - Alkyl Halides; Nucleophilic Substitution118
- Ch. 7 - Structure and Synthesis of Alkenes; Elimination158
- Ch.8 - Reactions of Alkenes171
- Ch.9 - Alkynes91
- Ch.10 - Structure and Synthesis of Alcohols143
- Ch.11 - Reactions of Alcohols104
- Ch. 12 - Infrared Spectroscopy and Mass Spectrometry22
- Ch. 13 - Nuclear Magnetic Resonance Spectroscopy45
- Ch. 14 - Ethers, Epoxides, and Thioethers72
- Ch. 15 - Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy89
- Ch. 16 - Aromatic Compounds74
- Ch. 17 - Reactions of Aromatic Compounds126
- Ch. 18 - Ketones and Aldehydes193
- Ch. 19 - Amines129
- Ch. 20 - Carboxylic Acids77
- Ch. 21 - Carboxylic Acid Derivatives141
- Ch. 22 - Condensations and Alpha Substitutions of Carbonyl Compounds175
- Ch. 23 - Carbohydrates and Nucleic Acids93
- Ch. 24 - Amino Acids, Peptides, and Proteins54
Chapter 8, Problem 47b
Limonene is one of the compounds that give lemons their tangy odor. Show the structures of the products expected when limonene reacts with an excess of each of these reagents.
b. m-chloroperoxybenzoic acid
Verified step by step guidance1
Step 1: Identify the functional groups in limonene. Limonene is a terpene with a cyclic structure containing a double bond in the ring and an exocyclic double bond.
Step 2: Understand the reaction mechanism of m-chloroperoxybenzoic acid (mCPBA). mCPBA is a peracid commonly used for epoxidation of alkenes. It reacts with double bonds to form epoxides.
Step 3: Determine the sites of reaction. In limonene, there are two double bonds: one in the ring and one exocyclic. Both double bonds can undergo epoxidation when treated with excess mCPBA.
Step 4: Predict the products. The reaction will yield two epoxides: one where the double bond in the ring is converted to an epoxide, and another where the exocyclic double bond is converted to an epoxide. These reactions occur independently at each double bond.
Step 5: Draw the structures of the products. For the ring double bond, the epoxide will form across the two carbons of the double bond. For the exocyclic double bond, the epoxide will form across the two carbons of the exocyclic double bond. Ensure stereochemistry is considered if applicable.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Limonene Structure and Properties
Limonene is a cyclic monoterpene with a distinctive structure featuring a six-membered ring and a double bond. It is known for its citrus aroma and is commonly found in the peels of citrus fruits. Understanding its structure is crucial for predicting its reactivity with various reagents, as the presence of double bonds makes it susceptible to electrophilic addition reactions.
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Epoxidation Reaction
Epoxidation is a chemical reaction that converts alkenes into epoxides, which are three-membered cyclic ethers. This reaction can be facilitated by reagents such as m-chloroperoxybenzoic acid (m-CPBA). The formation of an epoxide from limonene involves the addition of an oxygen atom across the double bond, resulting in a more reactive intermediate that can undergo further transformations.
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Reactivity of Epoxides
Epoxides are highly reactive due to the strain in their three-membered ring structure. They can undergo ring-opening reactions in the presence of nucleophiles, leading to the formation of diols or other functional groups. Understanding the reactivity of epoxides is essential for predicting the products formed when limonene reacts with m-CPBA, as the subsequent reactions can yield various alcohols or other derivatives.
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02:19General properties of epoxidation.
Related Practice
Textbook Question
Limonene is one of the compounds that give lemons their tangy odor. Show the structures of the products expected when limonene reacts with an excess of each of these reagents.
d. a mixture of osmic acid and hydrogen peroxide
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Textbook Question
Limonene is one of the compounds that give lemons their tangy odor. Show the structures of the products expected when limonene reacts with an excess of each of these reagents.
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Textbook Question
Predict the major products of the following reactions, and give the structures of any intermediates. Include stereochemistry where appropriate.
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Textbook Question
Limonene is one of the compounds that give lemons their tangy odor. Show the structures of the products expected when limonene reacts with an excess of each of these reagents.
(e) hot, concentrated potassium permanganate
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Textbook Question
Limonene is one of the compounds that give lemons their tangy odor. Show the structures of the products expected when limonene reacts with an excess of each of these reagents.
(c) ozone, then dimethyl sulfide
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