CHEM_354_Exam_4_Spring_2003

CHEM_354_Exam_4_Spring_2003 - NAME Multiple Choice Circle...

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NAME:_____________________________________________ Multiple Choice: Circle the best answer. 2 points each 1. Which of the following are strongly hydrogen-bonded in the liquid state? a. acid halides b. anhydrides c. esters d. amides e. nitriles 2. While the carbonyl stretching frequency for simple aldehydes, ketones and carboxylic acids is about 1710 cm -1 , the carbonyl stretching frequency for esters is about a. 1660 cm -1 b. 1700 cm -1 c. 1735 cm -1 d. 1800 cm -1 e. 2200 cm -1 a 3. A correct order of reactivity of acid derivatives towards nucleophilic attack is a. esters > acid anhydrides > amides b. anhydrides > amides > esters c. carboxylates > esters > amides d. anhydrides > acids > acid chlorides b e. anhydrides > amides > nitriles 4. Acids can be converted to primary amines by a. conversion to the nitrile followed by treatment with LiAlH 4 . b. conversion to the diazonium salt followed by treatment with NaBH 4 . c. conversion to the primary amide followed by treatment with LiAlH 4 . d. both a and b e. both a and c 5. Amides are less basic than amines because a. the carbonyl group donates electrons by resonance. b.
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CHEM_354_Exam_4_Spring_2003 - NAME Multiple Choice Circle...

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