Final08 - CHEM 203 Final Exam December 11, 2008 Your name:...

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Unformatted text preview: CHEM 203 Final Exam December 11, 2008 Your name: This a closed-notes, closed-book exam You may use your set of molecular models This exam contains 13 pages Time: 2h 30 min 1. ________ / 16 2. ________ / 24 3. ________ / 20 4. ________ / 30 5. ________ / 40 6. ________ / 40 7. ________ / 40 8. ________ / 40 TOTAL ________ / 250 = ________ / 100 This exam counts for 45% of your CHEM 203 final grade Chem 203 final exam p. 2 of 13 1. (16 pts.) Indicate the approximate pKa's for the Bronsted dissociation of the proton in boldface in the following molecules (write your answers in the appropriate boxes) CH 3 O H H H N H H C H H H H CH 3 CH 2 O H CH 3 C C H H Cl H F H OSO 3 H 2. (24 pts.) Draw: a. Accurate mechanisms for an example of E2 reaction and an example of E1 reaction: E2: Chem 203 final exam p. 3 of 13 E1: b. Two isomeric alkenes that furnish only compound A upon treatment with O 3 followed by Zn / H + (write your answers in the appropriate boxes): O O A and c. A carbocation that is stabilized by NO hyperconjugative interactions with CH bonds, and that will rearrange to form a new carbocation stabilized by eight hyperconjugative interactions with CH bonds: Chem 203 final exam p. Chem 203 final exam p....
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This note was uploaded on 12/14/2010 for the course CHEM 203 taught by Professor Unknown during the Spring '98 term at The University of British Columbia.

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Final08 - CHEM 203 Final Exam December 11, 2008 Your name:...

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