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Propose a mechanism, using curved arrows, for the base-catalysed aldol reaction and the subsequent dehydration between furfural and cyclohexanone Q6. КОН H

Propose a mechanism, using curved arrows, for the base-catalysed aldol reaction and the subsequent dehydration between furfural and cyclohexanone Q6. КОН H

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Solve Q 4,5,6 with expalanation 

Q6. Propose a mechanism, using curved arrows, for the base-catalysed aldol reaction and the subsequent dehydration between furfural and cyclohexanone КОН H
Transcribed Image Text:Q6. Propose a mechanism, using curved arrows, for the base-catalysed aldol reaction and the subsequent dehydration between furfural and cyclohexanone КОН H
Part 1 Predict which side of the equilibria, for the following two reactions, lies towards the left or towards the right and briefly explain why. (Note: You will need to find the pka values in water of the acid and the conjugate acid to begin to solve the problem). Q4. Part 2 Also, show the movement of electrons using curly arrows between the two reactants of each of the reactions. ? Reaction 1 H,NEt H,NEt H. H3C Ethylamine H3C :0: : Он Reaction 2 CH3 CH3 CH3 CH3 H3C H3C Acetone Q5. Treatment of a carboxylic acid with trifluoroacetic anhydride leads to an unsymmetrical anhydride that rapidly reacts with an alcohol to give an ester. F3C CF3 trifluoroacetic anhydride CH;CH,OH H3C" + CF;CO,H OH H3C CF3 H3C OCH2CH3 Unsymmetrical anhydride 1 Ethyl ester 2 (a) Propose a mechanism, using curved arrows, for the formation of the unsymmetrical anhydride 1. (b) Propose a mechanism, using curved arrows, for the formation of the ethyl ester 2. (c) Why is the unsymmetrical anhydride unusually reactive?
Transcribed Image Text:Part 1 Predict which side of the equilibria, for the following two reactions, lies towards the left or towards the right and briefly explain why. (Note: You will need to find the pka values in water of the acid and the conjugate acid to begin to solve the problem). Q4. Part 2 Also, show the movement of electrons using curly arrows between the two reactants of each of the reactions. ? Reaction 1 H,NEt H,NEt H. H3C Ethylamine H3C :0: : Он Reaction 2 CH3 CH3 CH3 CH3 H3C H3C Acetone Q5. Treatment of a carboxylic acid with trifluoroacetic anhydride leads to an unsymmetrical anhydride that rapidly reacts with an alcohol to give an ester. F3C CF3 trifluoroacetic anhydride CH;CH,OH H3C" + CF;CO,H OH H3C CF3 H3C OCH2CH3 Unsymmetrical anhydride 1 Ethyl ester 2 (a) Propose a mechanism, using curved arrows, for the formation of the unsymmetrical anhydride 1. (b) Propose a mechanism, using curved arrows, for the formation of the ethyl ester 2. (c) Why is the unsymmetrical anhydride unusually reactive?
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