CHEM301 F08 E2a key

CHEM301 F08 E2a key - CHEM 301 EXAM 2A 30 October 2008 Dr....

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CHEM 301 EXAM 2A NAME ____________________________ 30 October 2008 Dr. Suzanne Ruder Student ID: _________________________ Group # On my honor, I have neither given nor received aid on this exam______________________ signature INSTRUCTIONS: Read all questions carefully. If you have a question, raise your hand and someone will assist you. Paper other than the exam paper and molecular models are not permitted. Do your own work, and cover your answers. Part 1: Multiple Choice (4 pts each). Use the form provided to scratch off your answer. If your answer is correct there will be a star; if your answer is not correct, scratch off your second choice to receive partial credit for your answer. Scratch off questions 1-13 on your form. 1) In the lowest energy conformation of the compound below, how many alkyl substituents are equatorial? CH 3 CH 3 2) Rank the radicals (1-3) shown below in order of decreasing stability (i.e., from most stable to least stable). 1 2 3 3) Which of the following could act as nucleophiles? CH 3 Br Ө CN CH 3 O Ө H 2 SO 4 H 2 O 1 2 3 4 5 A) 1 and 4 B) 1, 2, 3 and 5 C) 2, 3 and 5 D) 2 and 3 A) 1 B) 2 C) 3 D) 4 A) 3 > 2 > 1 B) 3 > 1 > 2 C) 2 > 3 > 1 D) 1 > 2 > 3
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VCU Student ID: ___________________________ 4) Rank the following from best leaving group to worst leaving group. Br Ө HO Ө Cl Ө FCH 2 O Ө 1 2 3 4 A) 1>3>4>2 B) 1>3>2>4 C) 4>2>1>3 D) 3>1>4>2 5) Why is the leaving group in question #4 the best? A) The best leaving group is the weakest base. B) The negative charge is stabilized because atom is large and polarizable. C) HBr has a lower pKa than HCl,, H 2 Oand FCH 2 OH. D) All of the above.
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This note was uploaded on 04/30/2011 for the course CHEM 301 taught by Professor Sahli during the Spring '07 term at VCU.

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CHEM301 F08 E2a key - CHEM 301 EXAM 2A 30 October 2008 Dr....

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