8. A cuprate will not react with which of the following functional groups? a. b.

Question

8. A cuprate will not react with which of the following functional groups? a. b. c. d. An enone An acid chloride An ester An aldehyde 9. What is the initial product (ie before any work-up) of the saponification of an ester? a. A carboxylate b. c. d. An amide A carboxylic acid An organometallic 10. Where would the "C NMR signal for the carbonylcarbon of a ketone generally appear? a. 110 ppm b. 140-160 ppm c. 160-180 ppm d. 180-210 ppm 11. What is the purpose of the acid catalyst in the for sation of an acetal from an aldehyde? a. b. c. d. It is not necessary. It protonates the final alkoxide product. It makes the alcohol more nucleophilic. It makes the carbonyl more electrophilic. 12. Which of the following features the most oxidized carbon atom? A. B. C. D. 13. Why is pyridine used in the reaction of an acid ch:sride with an amine? a. b. c. It serves to deprotonate the amine nuclec phile. It serves to protonate the carbonyl It serves to neutralize the HCI that is forr ed. 14Farthe fomation of a grignard reagent you start with magnesium and? a. An acid chloride b. An alkyl halide c. An aldehyde d. An alcohol 15. Which of the following will react with NaBHe? a. An ester b. An amide c. A nitrile d. A ketone

Explanation / Answer

9. Answer is option (a) A carboxylate.

10. Answer is option (c) 160-180 ppm. Generally carbonyl carbon appears at 170 ppm.

11. Answer is option (d) It makes the carbonyl more electrophilic

13. Answer is option (c) It serves to neutralize the HCl that is formed.

14.  Answer is option (b) An alkyl halide.

15. Answer is option (d) A Ketone.

NaBH4 reduces aldehydes and ketones.

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