Midterm2140AFall 06Key_Ternansky

Midterm2140AFall 06Key_Ternansky - Chemistry 140A Fall,...

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Chemistry 140A Fall, 2006 Second Midterm Exam-250 points 11/14/06 DO NOT OPEN THIS EXAM UNTIL INSTRUCTED TO DO SO. ....FILL OUT THE FOLLOWING INFORMATION NOW : . YOUR NAME (Print): ________Ima Key_________________ PID: __________________________________________________ SIGNATURE: __________________________________________ ID checker initials: ______________________________________ If you wish to have any answers considered for a re-grade, your exam must be completed in INK ….also, no ALTERED answers will be considered for re-grade.
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1. (42 points) For the following molecules, assign “R” or “S” to each of the numbered atoms. If the atom is not chiral, write “NC” in the space. Next, indicate whether the molecule is chiral, achiral or meso by circling the appropriate designation. Note that meso is a special case of achiral and must be designated where appropriate. (1 pt each R, S, or NC; 2 pts each chiral, achiral, meso) H O O H N H OH H 3 C H D HO 2 C CO 2 H HO OH O H H Br Br Br Cl Cl H OH H H CH 3 H 3 C CH 3 CH 3 H Et CH 3 Br H NC R S NC S R R NC NC NC R S S S NC NC R R S S S S R R R NC 1 2 3 4 chiral achiral meso 1: 2: 3: 4: 1 2 3 1 2 3 4 1 2 3 4 5 chiral achiral meso chiral achiral meso 1: 2: 3: 4: chiral achiral meso 1: 2: 3: 4: 5: 1 2 chiral achiral meso 1: 2: 1 2 chiral achiral meso 1: 2: 1 2 3 1 2 chiral achiral meso 1: 2: chiral achiral meso 1: 2: 3: (a) (b) (c) (d) (e) (f) (g) (h) 1: 2: 3: 4: 4
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2. (25 points) The following questions refer to the compounds from the previous question (question #1): (3 points) is molecule(g) drawn in the most stable conformation? YES or NO (5 points) provide the IUPAC name for compound (e):
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This note was uploaded on 07/15/2008 for the course CHEM 140A taught by Professor Whiteshell during the Fall '04 term at UCSD.

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Midterm2140AFall 06Key_Ternansky - Chemistry 140A Fall,...

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