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Material Type: Quiz; Professor: Blackstock; Class: Elem Organic Chem II; Subject: CH-Chemistry; University: University of Alabama; Term: Summer 2009;
Typology: Quizzes
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1. Many nucleophilic addition reactions of aldehydes and ketones are catalyzed by acid or base. Bases catalyze hydration by: a. making the carbonyl group more electrophilic b. shifting the equilibrium of the reaction c. making the carbonyl group less electrophilic d. converting the water to hydroxide ion, a much better nucleophile 2. The reaction of an aldehyde with hydrogen cyanide is an example of ________ reaction. a. a nucleophilic substitution b. an electrophilic addition c. an electrophilic substitution d. a nucleophilic addition Choose the BEST reagent for carrying out each of the following conversions. 3. A. LiAlH 4 , THF, then H 3 O+^ B. NaBH 4 , ethanol C. 1. DIBAH, toluene D. All of the above work well 2. H 3 O+ 4. A. 1. PhMgBr, ether B. 1. PhCH 2 MgBr, ether 2. H 3 O+^ 2. H 3 O+ C. (C 6 H 5 ) 3 P=CHC 6 H 5 , THF D. Li(C 6 H 5 ) 2 Cu, ether
OCH 3 O H O O