FinalExam - Final Exam 12 December 2006 NAME Please read...

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Final Exam 12 December 2006 NAME Please read through each question carefully and answer in the spaces provided. A good strategy is to go through the test and answer all the questions you can do easily. Then go back and tackle the more difficult problems. Please make sure your structures are drawn clearly and indicate any necessary stereochemistry with bold or dashed bonds. Finally, think about what you know. Reason and common sense can often help you out. You may use the back of the pages for scratch paper. Problem 1 12 pts Problem 2 12 pts Problem 3 12 pts Problem 4 12 pts Problem 5 12 pts Problem 6 8 pts Problem 7 21 pts Problem 8 8 pts Problem 9 9 pts Problem 10 9 pts Problem 11 33 pts Problem 12 12 pts Problem 13 12 pts Problem 14 28 pts BONUS 15 pts TOTAL 200 pts Chem 341, Fall 2006 page 1 of 12 Final Exam
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1. Fill in the missing groups on the front carbon in the Newman projections for the conformers of butane. (12 pts) CH 3 H H CH 3 H H CH 3 H H CH 3 H H anti-butane lower energy eclipsed gauche-butane higher energy eclipsed 2. Draw a structure corresponding to each of the following names. (12 pts) a) E- 3-methyl-1,3-heptadien-5-yne b) 3-(1,1-dimethylethyl)-2,2-dimethylhexane c) S-cis -4-chloro-2-pentene 3 For each of the following pairs of conformers, circle the one that would be LEAST stable (higher energy). (12 pts) a) b) c) CH 3 CH 3 CH 3 CH 3 CH 3 H CH 3 H CH 3 CH 3 H H CH 3 CH 3 CH 3 CH 3 CH 3 H 3 C d) CH 3 H CH 3 H H H H 3 C H H H H 3 C H or or or or Chem 341, Fall 2006 page 2 of 12 Final Exam
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4. For each molecule below, indicate how many different resonances you would observe in the proton and carbon NMR. (12 pts) Cl Cl Cl OH
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FinalExam - Final Exam 12 December 2006 NAME Please read...

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