practice exam 1

practice exam 1 - Chem 140C Practice Midterm I January 26,...

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Chem 140C Practice Midterm I January 26, 2009 Q1_________(8 points) Q2_________(8 points) Q3_________(14 points) Q4_________(15 points) Q5_________(20 points) Q6_________(20 points) Q7_________(15 points) Total_________(100 points) Only use the front side of each page for your answers. Nothing on the back sides will be graded. If you write the exam in pencil or erasable pen, you give up your right to any kind of regrade. Name_______________________ PID#_________________________
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1. Resonance and Inductive Effects (8 points). Place the compounds below in order of increasing reactivity with nucleophiles in a nucleophilic addition process. Clearly explain the rationale for your choice. Functional group reactivity towards nucleophiles increases in the order: Amides < Esters < Anhydrides < Acyl Halides Acetamide (2) is more reactive than N,N-diisopropyl acetamide (1) because the carbonyl carbon in (1) is more hindered toward nucleophilic attack because of the large isopropyl groups near the reacting carbon
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2. Acidity and Basicity (8 points). Put the three compounds below in order of decreasing acidity with #1 being the most acidic and #3 being the least acidic.
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This note was uploaded on 08/04/2009 for the course CHEM CHEM 140C taught by Professor Finn during the Spring '08 term at UCSD.

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practice exam 1 - Chem 140C Practice Midterm I January 26,...

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