Textbook Question
Complete the following acid–base reactions. In each case, indicate whether the equilibrium favors the reactants or the products, and explain your reasoning.
(e) (CH3)3C–O– + CH3CH2OH ⇌
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Ch.10 - Structure and Synthesis of Alcohols
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 10, Problem 43a
Suggest carbonyl compounds and reducing agents that might be used to form the following alcohols.
(a) octan-1-ol
Verified step by step guidance1
Step 1: Identify the target alcohol structure. In this case, the target alcohol is benzyl alcohol, which has a benzene ring attached to a CH2OH group.
Step 2: Determine the carbonyl compound that can be reduced to form the target alcohol. Benzyl alcohol can be formed by reducing benzaldehyde (C6H5CHO), which has a benzene ring attached to a CHO group.
Step 3: Select an appropriate reducing agent for the reduction of the carbonyl compound to an alcohol. Common reducing agents include sodium borohydride (NaBH4) or lithium aluminum hydride (LiAlH4). NaBH4 is milder and typically used for aldehydes and ketones, while LiAlH4 is stronger and can reduce a wider range of compounds.
Step 4: Write the reaction mechanism. The reducing agent donates hydride ions (H-) to the carbonyl carbon of benzaldehyde, breaking the C=O double bond and forming a single bond with an OH group, resulting in benzyl alcohol.
Step 5: Consider reaction conditions. For NaBH4, the reaction is typically carried out in a protic solvent like ethanol or methanol. For LiAlH4, the reaction requires an aprotic solvent like ether and careful handling due to its reactivity.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Carbonyl Compounds
Carbonyl compounds are organic molecules that contain a carbon atom double-bonded to an oxygen atom (C=O). They include aldehydes and ketones, which can be reduced to alcohols. Understanding the structure and reactivity of carbonyl compounds is essential for predicting the products of reduction reactions.
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Reducing Agents
Reducing agents are substances that donate electrons in a chemical reaction, thereby reducing another species. Common reducing agents for carbonyl compounds include lithium aluminum hydride (LiAlH4) and sodium borohydride (NaBH4). The choice of reducing agent can influence the reaction conditions and the selectivity of the reduction.
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Alcohol Formation
Alcohols are organic compounds characterized by the presence of one or more hydroxyl (-OH) groups. The formation of alcohols from carbonyl compounds involves the addition of hydrogen to the carbonyl carbon, resulting in the conversion of the C=O bond to a C-OH bond. This transformation is a key reaction in organic synthesis and is fundamental to understanding alcohol chemistry.
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Related Practice
Textbook Question
Complete the following acid–base reactions. In each case, indicate whether the equilibrium favors the reactants or the products, and explain your reasoning.
(g) KOH + CH3CH2OH ⇌
871
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Textbook Question
Suggest carbonyl compounds and reducing agents that might be used to form the following alcohols.
(b) 1-cyclohexylpropan-1-ol
1300
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Textbook Question
Complete the following acid–base reactions. In each case, indicate whether the equilibrium favors the reactants or the products, and explain your reasoning.
(f) (CH3)3C–O– + H2O ⇌
954
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Textbook Question
Suggest carbonyl compounds and reducing agents that might be used to form the following alcohols.
(c) 1-phenylbutan-1-ol
(d)
621
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Textbook Question
Suggest carbonyl compounds and reducing agents that might be used to form the following alcohols.
(e)
(f)
601
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