Textbook Question
A misguided chemist attempted to synthesize trans-1,2-dimethylcyclohexane via the hydrogenation of 1,2-dimethylcyclohexene. Explain why this is not possible.
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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 31
In Solved Assessment 9.30(b), we came up with an alkene that under the conditions of ozonolysis would produce acetophenone and acetaldehyde. There is one other alkene that should produce the same compounds under these conditions. Which is it?
Verified step by step guidance1
Understand the process of ozonolysis: Ozonolysis is a reaction where alkenes are cleaved by ozone (O₃) to form carbonyl compounds. The double bond in the alkene is broken, and each carbon atom of the double bond is converted into a carbonyl group.
Identify the products: The problem states that the products of ozonolysis are acetophenone and acetaldehyde. Acetophenone is a ketone with the formula C₆H₅C(O)CH₃, and acetaldehyde is an aldehyde with the formula CH₃CHO.
Determine the structure of the original alkene: To produce acetophenone and acetaldehyde, the alkene must have a structure that, when cleaved, results in these two carbonyl compounds. Consider the carbon atoms that form the double bond in the alkene and how they relate to the carbonyl groups in the products.
Consider alternative alkene structures: The problem suggests there is another alkene that can produce the same products. Think about different ways to arrange the carbon atoms in the alkene that would still result in acetophenone and acetaldehyde upon ozonolysis. This involves considering different positions for the double bond and the surrounding carbon atoms.
Verify the alternative structure: Once you have proposed an alternative alkene structure, ensure that when it undergoes ozonolysis, it indeed produces acetophenone and acetaldehyde. This involves checking that the cleavage of the double bond leads to the correct carbonyl groups.
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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 where ozone (O3) cleaves alkenes to form carbonyl compounds. The process involves the formation of an ozonide intermediate, which is then reduced to yield aldehydes or ketones. Understanding the mechanism of ozonolysis is crucial for predicting the products formed from specific alkenes.
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06:30
General properties of ozonolysis.
Alkene Structure
The structure of an alkene, including its substituents and position of double bonds, determines the products formed during ozonolysis. Identifying the correct alkene involves understanding how different structural isomers can lead to the same set of carbonyl compounds, such as acetophenone and acetaldehyde.
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Carbonyl Compound Formation
Carbonyl compounds, such as ketones and aldehydes, are the typical products of ozonolysis. Acetophenone and acetaldehyde are specific examples, and recognizing how these compounds can be derived from different alkenes is essential. This involves understanding the cleavage of the double bond and the subsequent rearrangement of atoms.
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Related Practice
Textbook Question
Suggest a synthesis of the following aldehydes or ketones using the ozonolysis reaction of an alkene.
(b)
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Textbook Question
Draw the product(s) you'd expect when each of these alkenes is treated first with O3, then with CH3SCH3
(d)
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Textbook Question
Formation of the molozonide can be expected to proceed stereospecifically. Why is this the case? Show the two different molozonides you would expect to get from ozonolysis of (E)- and (Z)-3,4-dimethylhept-3-ene.
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Textbook Question
Suggest a synthesis of the following aldehydes or ketones using the ozonolysis reaction of an alkene.
(a)
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Textbook Question
What product results when the following molecules are treated with H₂ Pd/C? Be sure to indicate the relative stereochemical outcome. Draw both enantiomers of any racemic mixtures. [It is difficult to control the stoichiometry of gases so there is enough H₂ to reduce all alkenes.]
(b)
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