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Past Exam for CHEM 241 - Organic Chemistry II at Maryland (UMD)

Exam Information

Material Type:Exam 2
Professor:Staff
Class:CHEM 241 - Organic Chemistry II
Subject:Chemistry
University:University of Maryland
Term:Fall 1991
Keywords:
  • Provided That
  • In/on/at a Place
  • Explanation
  • Macromolecules
  • Continued...
  • Stereochemistry
  • Continuation
  • Substitution
  • Partial Credit
  • Aqueous Solution
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Sample Document Text

CHEM 243 EXAM #2 NAME Oct. 11, 1991 T A ______ . ___________ . _______ _ This exam has 7 questions on pages numbered 1-7. jplE!ase check your copy. Answer all questions in the spac:e provided. 1. /15 ----------- 2. /15 ----------- 3. /25 ----------- 4. /2.5 ----------- 5. /10 ----------- 6. /20 ----------- 7 . /25 ----------- Total /135 CHEM 243 EXAM #2 1. (15) Propose a complete mechanism for and identify the product of the following reaction: 1) CH3MgBr (2 eq), Et20 2) H30+ ? . ------------tl ... methyl benzoate 2. (15) Show the mechanism of THP ether formation by acid-catalyzed electrophilic addition of an alcohol to dihydropyran. How can you account for the regiochemistry of the reaction? RCH 2 0H+ 0 o dihydropyran HO THF .... ? . 1 CHEM 243 EXAM #2 3. (25) Choose the best reagent(s) for carrying out the following conversions from the list provided below. Place the letter of the best choice in the blank to the left of the r...

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