xdavid8A-Finalspring09

xdavid8A-Finalspring09 -...

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Unformatted text preview: Name:______________________________ Last, First (PLEASE PRINT) 1 CHEMISTRY 8A Spring 2009 Final Exam June 8, 2009 S. S. David 1. (12 points) 2. (24 points) 3. (14 points) 4. (27 points) 5. (8 points) 6. (6 points) 7. (5 points) 8. (16 points) 9. (20 points) 10. (10 points) 11. (16 points) 12, (8 points) 13. ( 8 points) 14. (10 points) 15. ( 6 points) 16. (10 points) Total (200 points) Extra Credit (10 points) Name:______________________________ Last, First (PLEASE PRINT) 2 H 3 C CH 3 O H H H 3 C CH 3 O H + H 1. Appetizers and Finger Food (2 pts each/8 total). Place answer in box. i. Which of the following molecules would NOT be described as a trans isomer? H 3 C OH O H 3 C OH O F F H 3 C OH O CH 3 H 3 C A B C D ii. Where is the lone pair of electrons of the nitrogen atom in an amine molecule located? A) in an s orbital B) in a p orbital C) in an sp orbital D) in an sp 2 orbital E) in an sp 3 orbital iii. The following mechanistic step in a reaction is referred to as what? A) elimination B) deprotonation C) protonation D) electronification iv. Which of the following describes a carbon-carbon double bond? A) one sigma bond and one pi bond B) two sigma bonds and one pi bond C) one sigma bond and two pi bonds D) two sigma bonds and two pi bonds vi. Which of the following is the correct list of the bonds in order of decreasing polarity ? (ie, list the most polar bond first) A) C-H > O-H > N-H B) O-H > C-H > N-H C) N-H > O-H > C-H D) O-H > N-H > C-H E) C-H > N-H > O-H vii. Which of the following molecules has a conjugated pi system? CH 3 O A B C D Name:______________________________ Last, First (PLEASE PRINT) 3 Cl Cl CH 3 CH 2 CH 3 I Cl O CH 2 Cl CH 2 OH 2. Potpourri i. (2 pts each/8 total) Assign the missing formal charge for each of the following molecules: H 3 COH 2 H 3 CNH 2 H 3 CCH 2 H 3 CO ii. (6 pts) Consider the following pair of compounds ( A and B ) and circle which compound will have the highest boiling point. Briefly explain your answer . OH NH 2 vs. A B iii. (4 pts) Given: cis-1,4-dichlorocyclohexane. Draw the correct conformation after a ring flip. You must maintain the exact carbon positions as shown in the original structure....
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xdavid8A-Finalspring09 -...

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