Textbook Question
Predict the products formed when cyclohexanone reacts with the following reagents.
(i) hydrazine, then hot, fused KOH
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Ch. 18 - Ketones and Aldehydes
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 18, Problem 53l
Predict the products formed when cyclohexanone reacts with the following reagents.
(l) acidic hydrolysis of the product from (k)
Verified step by step guidance1
Step 1: Understand the context of the problem. Cyclohexanone is a ketone, and the reaction in part (k) likely involves a transformation of cyclohexanone into a derivative. To proceed, you need to know the product from part (k). If part (k) involves a reaction like the formation of an imine or an enamine, this will influence the outcome of the acidic hydrolysis.
Step 2: Recall the general mechanism of acidic hydrolysis. Acidic hydrolysis typically involves the addition of water in the presence of an acid catalyst to break bonds such as imine (C=N) or enamine (C=C-N) bonds, regenerating the original carbonyl compound (in this case, cyclohexanone) and releasing the amine or ammonia.
Step 3: If the product from part (k) is an imine (R2C=NR'), the acidic hydrolysis will involve protonation of the imine nitrogen, followed by nucleophilic attack by water. This will lead to the formation of a tetrahedral intermediate, which will collapse to regenerate the ketone (cyclohexanone) and release the amine (R'NH2).
Step 4: If the product from part (k) is an enamine (R2C=C-NR2'), the acidic hydrolysis will involve protonation of the enamine double bond, followed by water addition to form a carbinolamine intermediate. This intermediate will then collapse to regenerate the ketone (cyclohexanone) and release the secondary amine (R2'NH).
Step 5: Summarize the expected products. The acidic hydrolysis of the product from part (k) will regenerate cyclohexanone and release the corresponding amine or ammonia, depending on the specific structure of the product from part (k). Ensure you understand the mechanism and intermediates involved in the hydrolysis process.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Cyclohexanone Reactivity
Cyclohexanone is a cyclic ketone that can undergo various reactions due to its carbonyl group. The reactivity of cyclohexanone is influenced by the presence of the carbonyl, which can participate in nucleophilic addition reactions. Understanding how cyclohexanone reacts with different reagents is crucial for predicting the products formed in subsequent reactions.
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Reactivity of Molecules
Acidic Hydrolysis
Acidic hydrolysis is a reaction where a compound reacts with water in the presence of an acid, leading to the cleavage of bonds and the formation of new products. In the context of ketones, this process can lead to the formation of alcohols or carboxylic acids. Recognizing the conditions and mechanisms of acidic hydrolysis is essential for predicting the products of the reaction involving cyclohexanone.
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Reaction Mechanisms
Understanding reaction mechanisms is vital in organic chemistry as it explains the step-by-step process by which reactants transform into products. For cyclohexanone and its derivatives, mechanisms such as nucleophilic addition and subsequent protonation steps during acidic hydrolysis must be considered. Familiarity with these mechanisms allows for accurate predictions of the final products formed in the reaction sequence.
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Related Practice
Textbook Question
Predict the products formed when cyclohexanecarbaldehyde reacts with the following reagents.
(a) PhMgBr, then H3O+
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Textbook Question
Predict the products formed when cyclohexanecarbaldehyde reacts with the following reagents.
b. Tollens reagent
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Predict the products formed when cyclohexanone reacts with the following reagents.
(h) sodium acetylide, then mild H3O+
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Predict the products formed when cyclohexanone reacts with the following reagents.
(k) sodium cyanide
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Predict the products formed when cyclohexanecarbaldehyde reacts with the following reagents.
(c) semicarbazide and weak acid
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