1999 Exam 2 Key

1999 Exam 2 Key - Name_KEY_ ID # _ ms Pnlotasreetchecd...

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Name__________________KEY__________________ Chem 2301, Fall 1999, Exam 2, Page 1 ID # ____________________________________ Please check here if you do NOT wish to have your exam returned in class. Exams not returned in class can be picked up at Professor Distefano’s office (437A Smith) during regularly scheduled office hours. Organic Chemistry 2301 Fall 1999 EXAM 2 200 Points 7 Pages plus table 1) 20 points __________________ 2) 20 points __________________ 3) 50 points __________________ 4) 40 points __________________ 5) 30 points __________________ 6) 40 points __________________ Total 200 points __________________ Average 135 SD 31
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Name__________________KEY__________________ Chem 2301, Fall 1999, Exam 2, Page 2 Count 227 High 200
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Name__________________KEY__________________ Chem 2301, Fall 1999, Exam 2, Page 3 1. (20 points) The structure of a potent nucleophile, the phenoxide anion, is given below. Give resonance structures for this ion (three additional structures). Show all lone pairs and formal charges. Do not draw dipolar structures. O O O H O H O H 2. (20 points) Consider the reaction shown below. Assume the reaction proceeds via an S N 2 reaction mechanism. CH 3 Br + I CH 3 I + Br (a) Draw a reaction coordinate diagram for this reaction. On your diagram, indicate the starting material, the product, the transition state and the activation energy. Starting Material Products Transition State Activation Energy Energy Reaction Coordinate (b) Draw a picture of the transition state for this reaction.
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Name__________________KEY__________________ Chem 2301, Fall 1999, Exam 2, Page 4 C H H H Br I
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1999 Exam 2 Key - Name_KEY_ ID # _ ms Pnlotasreetchecd...

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