2006spring-midterm01bsolns

2006spring-midterm01bsolns - Chemistry 140C(Tor Spring 2006...

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Chemistry 140C (Tor) Spring 2006 - 1st Midterm Exam (V.2) This exam accounts for 20% of the final grade. Time 6:30 – 7:50 PM. Mark your final answer clearly and completely erase irrelevant information! Remember: Exams written in pencil will not be regraded! Additional pages are at the end for your convenience. Please indicate if your final answer should be found at the end of the exam. Good Luck! Your Name (Please Print): _____________________________ Your ID # : _____________________________ Question # 1:. .................................................................... /10 Question # 2:. .................................................................... /40 Question # 3:. .................................................................... /28 Question # 4:. .................................................................... /08 Question # 5:. .................................................................... /34 Total ................................................................................... /120 KEY
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Name: ________________________ ID# _________________ 04-25-06 2 1. Treatment of the ± , ² -unsaturated ketone 1 with aqueous base facilitates an isomerization reaction to give product 2 : 1 HO ± , H 2 O O O 2 Write a detailed stepwise mechanism that explains this transformation. 1 O O H HO ± O Planar conjugated enolate can be protonated from both directions H O H O 2 O H
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Name: ________________________ ID# _________________ 04-25-06 3 2. For each one of the following reactions, circle the product that is preferentially formed.
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This note was uploaded on 04/14/2009 for the course CHEM140C 234234 taught by Professor Nefzi during the Spring '09 term at UCSD.

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2006spring-midterm01bsolns - Chemistry 140C(Tor Spring 2006...

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