Chapter 18 - Chapter 18 Enols and Enolates Student: _ 1....

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Chapter 18 Enols and Enolates Student: ___________________________________________________________________________ 1. How many α -hydrogens does 2-hexanone have? A. 3 B. 4 C. 5 D. 6 2. Which one of the following cannot form an enolate anion? A. 2,2-dimethylbutanal B. 2-ethylbutanal C. 2,3-dimethylbutanal D. 3,3-dimethylbutanal 3. Which of the following have an enol form? I. benzaldehyde, C 6 H 5 CHO II. 2,2-dimethylpropanal, (CH 3 ) 3 CCHO III. 2-chloropropanal, CH 3 CHClCHO A. only I B. only II C. only III D. all of them have an enol form 4. Which one of the following has two different enol forms? A. cyclohexanone B. 2,2-dimethylcyclohexanone C. 3,3-dimethylcyclohexanone D. 4,4-dimethylcyclohexanone 5. How many alpha hydrogens are there on 2,4-dimethyl-3-pentanone? A. two B. three C. four D. six
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6. Identify the most acid hydrogen for the following compound. A. 1 B. 2 C. 3 D. 4 7. What is the product of the reaction below? A. A B. B C. C D. D
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8. Arrange the following compounds in order of decreasing acidity. A. I > II > III B. II > III > I C. III > II > I D. III > I > II 9. Identify the keto form of the following enol. A.
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Chapter 18 - Chapter 18 Enols and Enolates Student: _ 1....

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