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.
m. CHBr3 and 50% aq. NaOH
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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 48c,d
Give the products expected when the following compounds are ozonized and reduced.
(c) 
(d) 
Verified step by step guidance1
Step 1: Understand the reaction conditions. Ozonolysis involves the cleavage of double bonds in alkenes using ozone (O₃), followed by reduction (commonly with zinc and water or dimethyl sulfide). This process breaks the double bond and forms carbonyl compounds (aldehydes or ketones).
Step 2: Analyze compound (c). The structure contains a double bond in a bicyclic system. Identify the location of the double bond and predict the cleavage points. The double bond will split into two fragments, each forming a carbonyl group.
Step 3: For compound (c), draw the products after ozonolysis. The double bond will break, and the two carbons involved in the double bond will each form a carbonyl group. Consider the connectivity of the bicyclic structure to determine the resulting aldehydes or ketones.
Step 4: Analyze compound (d). This structure contains a double bond in a substituted bicyclic system. Identify the cleavage points of the double bond, and predict the products based on the substitution pattern and connectivity.
Step 5: For compound (d), draw the products after ozonolysis. The double bond will break, and the two carbons involved in the double bond will each form a carbonyl group. Consider the substituents on the bicyclic structure to determine the resulting aldehydes or ketones.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Ozonolysis
Ozonolysis is a reaction involving the cleavage of alkenes or alkynes using ozone (O3) to form carbonyl compounds. The process typically occurs in two steps: first, the alkene reacts with ozone to form a molozonide, which rearranges to form ozonide. The ozonide is then reduced, often using a reducing agent like zinc or dimethyl sulfide, yielding aldehydes or ketones as products.
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General properties of ozonolysis.
Reduction of Ozonides
The reduction of ozonides is a crucial step following ozonolysis, where the unstable ozonide is converted into stable carbonyl compounds. Common reducing agents include zinc in acetic acid or dimethyl sulfide, which help to cleave the ozonide and yield the final products. Understanding the choice of reducing agent is important, as it influences the nature of the carbonyl products formed.
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Stereochemistry of Products
Stereochemistry plays a significant role in determining the structure of the products formed during ozonolysis. Depending on the configuration of the starting alkene, the ozonolysis can yield different stereoisomers of the carbonyl compounds. Recognizing the stereochemical implications of the reaction is essential for predicting the specific products and their properties.
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Related Practice
Textbook Question
Give the products expected when the following compounds are ozonized and reduced.
(a)
(b)
1304
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Textbook Question
Show how you would make the following compounds from a suitable cyclic alkene.
(b)
1416
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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.
(i) hydrogen bromide gas in a solution containing dimethyl peroxide
1229
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Textbook Question
Show how you would make the following compounds from a suitable cyclic alkene.
(a)
1601
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Textbook Question
Show how you would make the following compounds from a suitable cyclic alkene.
(c)
1066
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