Quiz 2A 10.01.10

Quiz 2A 10.01.10 - Quiz 2 1 October 2010 Chemistry 262...

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Unformatted text preview: Quiz 2 1 October 2010 Chemistry 262 Name 1. Provide a complete arrow pushing mechanism for the reaction below [9 pts]. MULTIPLE CHOICE: 2 pts each 2. What are the missing reagents? (Choose one answer.) ANSWER: _____ OH b. 1. CH3OH, H+ 2. LiAlH4, THF 3. H2O H O O a. 1. LiAlH4, THF 2. H2O c. 1. DIBALH, -78 oC 2. H2O d. NaBH4, EtOH e. 1. CH3OH, H+ 2. DIBALH, -78 oC 3. H2O f. 1. SOCl2 2. LiAlH4, THF 3. H2O 1 3. What is the major organic product of the following reaction? (Choose one answer.) O OH a 1. 2 Lio, pentane 2. CO2 3. CH3Br CH3Br ANSWER: _____ O e f c b O OCH3 O H O d OH 4. Why does the reaction below give only 50% yield? Not all products are illustrated. (Choose the two best answers.) O O O O 1.0 M a.! The amide product is unstable. NH2 1.0 M 0 .5 M N H b.! The anhydride starting material is too stable. c.! The anhydride starting material wonʼt react without a catalyst. d.! The amine nucleophile wonʼt react without a catalyst. ANSWERS: _____ _____ e.! The equilibrium lies to the left. f.! The acidity of one of the initial reaction products is problematic. g.! The basicity of one of starting materials is problematic. h.! The acidity of one of the starting materials is problematic. i.! The basicity of one of the products is problematic. 2 ...
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This note was uploaded on 10/25/2010 for the course CHEM 262 taught by Professor Forbes during the Fall '08 term at UNC.

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