Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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5. What would you use to prepare the following ylide from the starting phosphonium salt?
PPH3 Br
PPhs
A) butyl lithium
B) 1-bromo-2-methylpropane
C) triphenylphosphine
D) acetic acid
6. What is the product of the following reaction?
CHO
PhP- CH,
OH
PPH3
PPH3
II
II
IV
А) I B) П С) II D) IV
7. What needs to be done to make the following reaction proceed?
но
OH
A) Heat the reaction.
B) Add an acid catalyst only.
C) Add a base catalyst only.
D) Heat the reaction and add an acid catalyst.
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Transcribed Image Text:5. What would you use to prepare the following ylide from the starting phosphonium salt? PPH3 Br PPhs A) butyl lithium B) 1-bromo-2-methylpropane C) triphenylphosphine D) acetic acid 6. What is the product of the following reaction? CHO PhP- CH, OH PPH3 PPH3 II II IV А) I B) П С) II D) IV 7. What needs to be done to make the following reaction proceed? но OH A) Heat the reaction. B) Add an acid catalyst only. C) Add a base catalyst only. D) Heat the reaction and add an acid catalyst.
2. What is the structure of 3-methylcyclohexanone?
II
II
IV
А) I B) П С) II D) IV
3. Using IR spectroscopy, how can you tell the difference between a ketone and an
aldehyde?
A) A ketone has no carbonyl stretch at 1720 cm-!.
B) An aldehyde has a carbonyl stretch at 1820 cm-1.
C) An aldehyde has two C-H stretches between 2700-2850 cm-1.
D) A ketone has no C-H stretches.
4. Why can't you use acidic conditions (such as aqueous hydrochloric acid) for the addition
of a Grignard reagent to a ketone?
A) Because the Grignard reagent will react with the acid and be quenched.
B) Because the ketone will be protonated and thus unreactive.
C) Because the ketone will form an unreactive enol.
D) Because the Grignard reagent won't dissolve in aqueous solutions.
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Transcribed Image Text:2. What is the structure of 3-methylcyclohexanone? II II IV А) I B) П С) II D) IV 3. Using IR spectroscopy, how can you tell the difference between a ketone and an aldehyde? A) A ketone has no carbonyl stretch at 1720 cm-!. B) An aldehyde has a carbonyl stretch at 1820 cm-1. C) An aldehyde has two C-H stretches between 2700-2850 cm-1. D) A ketone has no C-H stretches. 4. Why can't you use acidic conditions (such as aqueous hydrochloric acid) for the addition of a Grignard reagent to a ketone? A) Because the Grignard reagent will react with the acid and be quenched. B) Because the ketone will be protonated and thus unreactive. C) Because the ketone will form an unreactive enol. D) Because the Grignard reagent won't dissolve in aqueous solutions.
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