CHM2210F11EXIIIV4

CHM2210F11EXIIIV4 - Panther #: NAME: FLORIDA INTERNATIONAL...

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Panther #: NAME: FLORIDA INTERNATIONAL UNIVERSITY Department of Chemistry & Biochemistry CHM 2210-U01, U02 – ORGANIC CHEMISTRY I Fall 2011 Dr. Keller, Dr. Landrum EXAM III (V4)
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CHM 2210-U01U02, Fall 2011 Exam III (V4), Page 2
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CHM 2210-U01U02, Fall 2011 Exam III (V4), Page 3 MULTIPLE CHOICE QUESTIONS: Choose the best answer to each question and bubble it in on the Scantron answer sheet. Marks on the test pages will NOT be graded. 1. Assuming free rotation about the C2-C3 bond, which is a meso compound? CH 3 Cl CH 3 H Cl H CH 3 CH 3 Cl H Cl H CH 3 CH 3 H Cl Cl H H CH 3 Cl H CH 3 Cl a. b. c. d. e. None of these is meso . 2. They methyl groups in cis -1,2-dimethyl- cyclohexane will occupy what positions in the most stable conformation? a. axial, axial b. equatorial, equatorial c. equatorial, axial d. None of the above 3. Which of the following statements is true about a reaction which occurs by the S N 1 mechanism? a. The reaction is fastest with primary allkyl halides. b. The reaction exhibits a one-step mechanism. c. The reaction rate increases as the leaving group ability increases. d. The reaction rate increases as the strength of the nucleophile increases. e. Both c and d are true. 4. Ring strain can result from which of the following: a. angle strain b. torsional strain c. small ring size d. two of the above e. all of the above 5. What is the correct name for the following compound? CH 3 H Cl H Cl Cl CH 3 CH 3 H H a. (2R)-2-Chloro-3,3-dichloro-5-methylhexane b. (2S)-2-Chloro-3,3-dichloro-5-methylhexane c. (2R)-2,3,3-Trichloro-5-methylhexane d. (2S)-2,3,3-Trichloro-5-methylhexane e. (5R)-4,4,5-Trichloro-2-methylhexane 6. Which isomer of C 5 H 10 would you expect to have the smallest heat of combustion? a. Cyclopentane b. Methylcyclobutane c. 1,1-Dimethylcyclopropane d. cis -1,2-Dimethylcyclopropane e. trans -1,2-Dimethylcyclopropane
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CHM 2210-U01U02, Fall 2011 Exam III (V4), Page 4 7. Which would be formed in the following reaction? CH 3 Br CH 3 H CH 3 OH 55˚ ? H OCH 3 CH 3 CH 3 H CH 3 OCH 3 CH 3 H CH 3 CH 3 CH 3 CH 2 I II III IV a. I b. II c. III d. IV e. All of the above 8. Which of the following is NOT a nucleophile? a. H 2 O b. CH 3 O - c. PH 3 d. NH 4 + e. All are nucleophiles. 9. How are the molecules shown below related to each other? H CH 3 CH 3 CH 3 CH 3 H H H H CH 3 CH H and CH 3 CH 3 a. They are constitutional isomers. b.
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CHM2210F11EXIIIV4 - Panther #: NAME: FLORIDA INTERNATIONAL...

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