Textbook Question
a. Which compound would you expect to have a greater dipole moment, methyl acetate or butanone?
b. Which would you expect to have a higher boiling point?
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Ch. 15 - Reactions of Carboxylic Acids and Carboxylic Acid Derivatives
Bruice8th EditionOrganic ChemistryISBN: 9780135213711
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Table of contents
- Ch. 1 - Remembering General Chemistry: Electronic Structure and Bonding (Part 1)31
- Ch. 1 - Remembering General Chemistry: Electronic Structure and Bonding (Part 2)65
- Ch. 2 - Acids and Bases: Central to Understanding Organic Chemistry84
- Ch. 3 - An Introduction to Organic Compounds:Nomenclature, Physical Properties, and Structure183
- Ch. 4 - Isomers: The Arrangement of Atoms in Space121
- Ch. 5 - Alkenes: Structure, Nomenclature, and an Introduction to Reactivity • Thermodynamics and Kinetics83
- Ch. 6 - The Reactions of Alkenes • The Stereochemistry of Addition Reactions175
- Ch. 7 - The Reactions of Alkynes • An Introduction to Multistep Synthesis119
- Ch. 8 - Delocalized Electrons: Their Effect on Stability, pKa, and the Products of a Reaction • Aromaticity and Electronic Effects: An Introduction to the Reactions of Benzene148
- Ch. 9 - Substitution and Elimination Reactions of Alkyl Halides212
- Ch. 10 - Reactions of Alcohols, Ethers, Epoxides, Amines, and Sulfur-Containing Compounds131
- Ch. 11 - Organometallic Compounds60
- Ch. 12 - Radicals90
- Ch. 13 - Mass Spectrometry; Infrared Spectroscopy; UV/Vis Spectroscopy62
- Ch. 14 - NMR Spectroscopy95
- Ch. 15 - Reactions of Carboxylic Acids and Carboxylic Acid Derivatives123
- Ch. 16 - Reactions of Aldehydes and Ketones • More Reactions of Carboxylic Acid Derivatives141
- Ch. 17 - Reactions at the Alpha-Carbon101
- Ch. 18 - Reactions of Benzene and Substituted Benzenes144
- Ch. 19 - More About Amines • Reactions of Heterocyclic Compounds49
- Ch. 20 - The Organic Chemistry of Carbohydrates80
- Ch. 21 - Amino Acids, Peptides, and Proteins57
- Ch. 22 - Catalysis in Organic Reactions and in Enzymatic Reactions35
- Ch. 23 - The Organic Chemistry of the Coenzymes—Compounds Derived from Vitamins1
- Ch. 28 - Pericyclic Reactions58
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Bruice 8th EditionCh. 15 - Reactions of Carboxylic Acids and Carboxylic Acid DerivativesProblem 58a,b
Bruice 8th EditionCh. 15 - Reactions of Carboxylic Acids and Carboxylic Acid DerivativesProblem 58a,bChapter 16, Problem 58a,b
What reagents would you use to convert methyl propanoate to the following compounds?
a. isopropyl propanoate
b. sodium propanoate
Verified step by step guidance1
Step 1: To convert methyl propanoate to isopropyl propanoate, perform a transesterification reaction. Use isopropanol (isopropyl alcohol) as the alcohol reagent and an acid catalyst such as sulfuric acid (H₂SO₄) to facilitate the exchange of the methyl group with the isopropyl group.
Step 2: Heat the reaction mixture to promote the transesterification process, ensuring the methyl group is replaced by the isopropyl group to form isopropyl propanoate.
Step 3: To convert methyl propanoate to sodium propanoate, perform a saponification reaction. Use a strong base such as sodium hydroxide (NaOH) to hydrolyze the ester bond in methyl propanoate.
Step 4: During saponification, the ester bond is broken, yielding propanoic acid and methanol. The propanoic acid reacts with the sodium hydroxide to form sodium propanoate.
Step 5: Isolate the sodium propanoate by neutralizing the reaction mixture and removing any excess water or byproducts.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Transesterification
Transesterification is a chemical reaction where an ester reacts with an alcohol to form a different ester and a new alcohol. This process involves the exchange of the alkoxy group of the ester with the alcohol, which is crucial for converting methyl propanoate to isopropyl propanoate. The reaction typically requires an acid or base catalyst to proceed efficiently.
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Saponification
Saponification is the process of converting an ester into a carboxylic acid and an alcohol through hydrolysis, usually in the presence of a strong base like sodium hydroxide. In the context of the question, it is relevant for converting methyl propanoate to sodium propanoate, where the ester is hydrolyzed to yield the sodium salt of the corresponding acid.
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Reagents for Ester Reactions
The choice of reagents is critical in ester reactions. For transesterification, an alcohol (like isopropanol) is needed, while for saponification, a strong base (such as sodium hydroxide or sodium carbonate) is required. Understanding the role of these reagents helps in determining the correct pathway for the desired product transformations.
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Related Practice
Textbook Question
What products would you expect to obtain from the following reactions?
a. malonic acid + 2 acetyl chloride
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Textbook Question
What reagents would you use to convert methyl propanoate to the following compounds?
c. N-ethylpropanamide
d. propanoic acid
Textbook Question
What products would you expect to obtain from the following reactions?
b. methyl carbamate + methylamine
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Textbook Question
Because bromocyclohexane is a secondary alkyl halide, both cyclohexanol and cyclohexene are formed when the alkyl halide reacts with hydroxide ion. Suggest a method to synthesize cyclohexanol from bromocyclohexane that forms little or no cyclohexene.
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Textbook Question
Using an alcohol for one method and an alkyl halide for the other, show two ways to make each of the following esters:
d. methyl phenylethanoate (odor of honey)
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