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

Exam Information

Material Type:Exam 3
Professor:Staff
Class:CHEM 241 - Organic Chemistry II
Subject:Chemistry
University:University of Maryland
Term:Spring 1991
Keywords:
  • Macromolecules
  • Continued...
  • Continuation
  • Temperature
  • Substitution
  • Acetoacetic Ester
  • Transformation
  • Following Reactions
  • Room Temperature
  • Preparation
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Sample Document Text

CHEM 243-0r. Rmmon Chps.21-23 R p ri I 1 5, 1 9 9 1 EHom 3 NRME_. ______________ _ T.R. _. ______________ _ This eHom has 9 questions on pages numbered 1-6. Checlc your COP!J now. Grader 1. ____ /12 2. ____ /15 3. ___ /15 4. ____ /23 5. ____ /25 6. ___ 124 7. ___ /15 8. ___ /15 9. ____ /6 Total 1150 (12) 1. Which of the following compounds cannot be prepared via an acetoacetic ester synthesis? o 0 0 II II II II a) CH 3 CCH 2 Ph b) PhCCH 3 c) CH 3 CH 2 CCH 3 d) CH 3 CC(CH 3 h (15) 2. Write a complete set of resonance structures for the enol ate anion of N=C-CH T C0 2 C 2 H s . (15) 3. Use cyclopentanone to illustrate the aldol reaction. Show reactants, reagents and products. No mechanisms please. Assume the reaction conditions involve vigorous reflux. (23) 4. Write a detailed mechanism for the following reaction. Show all steps, etc. o II NaOEt CH3CC(CH3)zC02C2Hs -----... (CH 3 )zCHC0 2 C 2 H s + CH 3 CO Z C 2 H ...

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