Normal No Spacing Heading A v Paragraph Styles 17. What temperature conditions are necessary for the decarboxylation of a pentanoic acid? a. temperatures below room temperature b. room temperature c. temperatures slightly above room temperature d. very high temperatures 18. Which carboxylic acids undergo decarboxylation quite readily on mild heating? a. all of them b. none of them c. only a-ketoacids d. only B-ketoacids

Normal No Spacing Heading A v Paragraph Styles 17. What temperature conditions are necessary for the decarboxylation of a pentanoic acid? a. temperatures below room temperature b. room temperature c. temperatures slightly above room temperature d. very high temperatures 18. Which carboxylic acids undergo decarboxylation quite readily on mild heating? a. all of them b. none of them c. only a-ketoacids d. only B-ketoacids

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter21: Carboxylic Acid Derivatives: Nucleophilic Acyl Substitution Reactions

Section21.SE: Something Extra

Problem 68AP: When a carboxylic acid is dissolved in isotopically labeled water, the label rapidly becomes...

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When a carboxylic acid is dissolved in isotopically labeled water, the label rapidly becomes incorporated into both oxygen atoms of the carboxylic acid. Explain.
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Ethyl butyrate, CH3CH2CH2CO2CH2CH3CH3CH2CH2CO2CH2CH3, is an artificial fruit flavor commonly used in the food industry for such flavors as orange and pineapple. Its fragrance and taste are often associated with fresh orange juice, and thus it is most commonly used as orange flavoring. It can be produced by the reaction of butanoic acid with ethanol in the presence of an acid catalyst (H+H+): CH3CH2CH2CO2H(l)+CH2CH3OH(l)H+⟶CH3CH2CH2CO2CH2CH3(l)+H2O(l) Given 8.45 gg of butanoic acid and excess ethanol, how many grams of ethyl butyrate would be synthesized, assuming a complete 100%% yield? Express your answer in grams to three significant figures. A chemist ran the reaction and obtained 5.50 gg of ethyl butyrate. What was the percent yield? Express your answer as a percent to three significant figures. The chemist discovers a more efficient catalyst that can produce ethyl butyrate with a 78.0%% yield. How many grams would be produced from 8.45 gg of butanoic acid and excess…
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