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CHE201B - Exam 2 2005

CHE201B - Exam 2 2005 - Organic Chemistry 201/203 Second...

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Organic Chemistry 201/203 Second Hour Examination November 3, 2005 Name (Print) _________________________________ Signature _________________________________ Student Identification _________________________________ Number Problem Total Possible Score Earned Score I (30) ___________ II (30) ___________ III (30) ___________ IV (30) ___________ V (30) ___________ Total (150) ___________
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2 PROBLEM I Write one example of each of the following (3 points each). (A) A cis -cycloalkene (B) An E -alkene (C) A primary alkyl halide (D) An allylic radical (E) A nucleophile that shows strong steric hindrance in an S N 2 reaction Score - Problem I
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3 (F) An anion that is very reactive as a nucleophile in S N 2 reactions, but weakly reactive as a base in E2 reactions (G) A polar aprotic solvent – show chemical structure (H) An achiral molecule that has two chiral carbon atoms (I) A chiral molecule that has no chiral carbon atoms (J) An alkyl bromide that is very unreactive toward S N 2 nucleophilic substitution.
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4 PROBLEM II Circle the correct answer to each question (5 points each). (A) Which of the following molecules is not expected to react as a nucleophile?
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