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18. The behavior of acid chlorides is different from that of aldehydes in a reac

ID: 1038564 • Letter: 1

Question

18. The behavior of acid chlorides is different from that of aldehydes in a reaction with a nucleophile because A. The acid chloride contains a better leaving group B. The aldehyde is more easily oxidized C. The carbonyl of the aldehyde is more positive D. The carbonyl of the aldehyde is less hindered d? 19. What is the IUPAC name for the following compoun D. 2,2-Dimethylpentanal A. Pivaldehyde B. 2,2-Dimethylpropanal C. Tert-butyl aldehyde 20. what is the structure of 3-methylcyclohexanone? IV A. I D. IV 21. Using 'H NMR spectroscopy, how can you tell the difference between an aldehyde and a ketone? A. An aldehyde has a C-H stretch (one or two) between 2700-2830 cm1 B. An aldehyde has a proton signal between 9-10 ppm. C. A ketone has signals around 2-3 ppm D. A ketone has a signal around 200 ppm 22. Which of the following oxidants would work for the following reaction? A. H2Cr20, B. FeCla C. 12 D. Ag20 23. What is the first step in nucleophilic addition under acidic conditions? A. Protonation of the nucleophile B. Addition of the nucleophile C. Loss of water D. Protonation of the carbonyl

Explanation / Answer

Ans-18, A (acid chloride are more reactive than aldehyde or ketone because they contains chloride which are good leaving group.)

Ans-19, B (2,2-dimethylpropanal)

Ans-20, B (addition of nucleophile)

Ans-21, B

Ans-22, A (Chromic acid)

Ans-23,

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