Domanda del libro di testo
Propose a mechanism for the acid-catalyzed reaction of acetic acid with ethanol to give ethyl acetate.
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Ch. 20 - Carboxylic Acids
Wade9th EditionOrganic ChemistryISBN: 9780135213728
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TOC.tableOfContents
- 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
Capitolo 20, Problema 11f
Show how you would synthesize the following carboxylic acids, using the indicated starting materials.
(f) allyl iodide → but-3-enoic acid
Guida verificata passo dopo passo1
Step 1: Begin by identifying the functional groups in the starting material (allyl iodide) and the target molecule (but-3-enoic acid). Allyl iodide contains an alkyl halide group, while but-3-enoic acid contains a carboxylic acid group and a double bond.
Step 2: Plan the synthesis by considering the transformation of the alkyl halide into a carboxylic acid. A common method involves converting the alkyl halide into a Grignard reagent, which can then react with carbon dioxide to form a carboxylic acid.
Step 3: React allyl iodide with magnesium in dry ether to form allyl magnesium iodide, a Grignard reagent. The reaction can be represented as:
Step 4: Bubble carbon dioxide gas through the Grignard reagent solution to form the carboxylic acid intermediate. The reaction can be represented as:
Step 5: Perform an acidic workup (e.g., using dilute HCl) to protonate the carboxylate ion and isolate the final product, but-3-enoic acid. This step ensures the carboxylic acid is fully formed and purified.
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Carboxylic Acid Synthesis
Carboxylic acids can be synthesized through various methods, including oxidation of alcohols, hydrolysis of nitriles, and carbon chain elongation. Understanding the functional groups and reactivity of starting materials is crucial for determining the appropriate synthetic route. In this case, the transformation of allyl iodide to but-3-enoic acid involves strategic manipulation of carbon skeletons and functional groups.
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04:20
Carboxylic Acids Nomenclature
Allyl Iodide Reactivity
Allyl iodide is a reactive alkyl halide that can undergo nucleophilic substitution and elimination reactions. Its structure allows for the formation of a double bond through elimination, which is essential for synthesizing alkenes. Recognizing how allyl iodide can be transformed into intermediates that lead to the desired carboxylic acid is key to solving the synthesis problem.
Video consigliato:
03:20Specific Reactions - Allylic Bromination
Carbon Chain Elongation
Carbon chain elongation involves adding carbon atoms to a molecule, often through reactions like Grignard reactions or alkylation. In the context of synthesizing but-3-enoic acid, understanding how to extend the carbon chain from allyl iodide and subsequently introduce a carboxylic acid functional group is vital. This concept is fundamental in organic synthesis for constructing complex molecules from simpler precursors.
Video consigliato:
04:25Name the longest carbon chain
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Show how you would synthesize the following carboxylic acids, using the indicated starting materials.
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A carboxylic acid has two oxygen atoms, each with two nonbonding pairs of electrons.
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Show how you would synthesize the following carboxylic acids, using the indicated starting materials.
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