CH241.601.08C.EX3.ANS

CH241.601.08C.EX3.ANS - Name STUDENT ID NO EXAM NO...

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Name: ____________________________________________ 1 STUDENT ID NO. __________________________ EXAM NO. _________________ DEPARTMENT OF CHEMISTRY UNIVERSITY OF PENNSYLVANIA Chemistry 241 CGS, Fall, 2008 Third Midterm Examination November 25 th , 2008 6:30-8:00 Dr. Roberts ANSWER KEY DISTRIBUTION 90-100 12 80-89 19 70-79 16 60-69 7 50-59 10 40-49 4 <40 7 Average 70.7 Median 72.0
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Name: ____________________________________________ 2 I. (4 points each, 32 points total) Provide structures or information which satisfy the following descriptions. a. The IUPAC name for the compound shown below. Cl (Z)-2-chloro-4-propyl-2-octene or (Z)-2-chloro-4-propyloct-2-ene b. The alkenyl borane formed when 3-ethyl-1-pentyne reacts with disiamylborane. B H H c. The structure of the monoalkene which would produce the compound shown below upon treatment with ozone followed by dimethylsulfide. O O d. The structure of the ozonide of cyclohexene. O O O
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Name: ____________________________________________ 3 e. The propagation steps for the addition of HBr to 2-methylpropene in the presence of peroxides. •Br Br Br H Br H Br + •Br f. A Fischer projection of a stereoisomer of 3,4-dibromohexane which would give (Z)-3-hexene upon treatment with sodium iodide in acetone.
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