EXAM42008KEY

EXAM42008KEY - CHEMISTRY 2261 EXAM 4 November 19, 2008 NAME...

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CHEMISTRY 2261 November 19, 2008 EXAM 4 NAME (PRINT)____________________________________________ 1 2 3 4 5 6 7 8 9 10 11 TOTAL 12 A N S W E R K E Y LIST number 1. (8 pts) For each or the following reaction sequences choose the correct alkene starting material and product. OH 1. BH 3 , THF 2. HOOH, NaOH 1. TsCl, pyridine 2. EtO , EtOH a) choose (circle) one choose (circle) one 1. BH 3 , THF 2. HOOH, NaOH 1. PBr 3 , pyridine 2. EtO , EtOH b) choose (circle) one choose (circle) one OH or or or or 2. (6 pts, 3 pts ea) Provide the reagents necessary to carry out each of the following transformations. O OEt OH OH OEt a) b) EtOH, H + EtO
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2 3. ( 5 pts ) Rank the following alkyl bromides in order of reactivity using numbers 1-5 (1 = most reactive; 5 = least reactive) in an S N 2 reaction where the alkyl bromide is converted to the corresponding nitrile: NaCN NaBr R Br acetone R CN + Br Br Br Br Br 12 5 4 3 4. (5 pts) Rank the following alkyl bromides in order of reactivity using numbers 1-5 (1 = most reactive; 5 = least reactive) in an S N 1 reaction where the alkyl bromide is converted to the
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This note was uploaded on 06/09/2011 for the course CHEM 2261 taught by Professor Crowe during the Spring '08 term at LSU.

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EXAM42008KEY - CHEMISTRY 2261 EXAM 4 November 19, 2008 NAME...

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