Homework 3 - Homework Set#3 Chemistry 1315 Spring 2007 Name...

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Homework Set #3 Chemistry 1315 Spring 2007 _________________________ Name Handed out: 2-06-07 Due: 2-13-07 at 9:30am in class Late Policy: One day late (2-14-07 10am): 50% off Two days late (2-15-07 10am): 75% off After 10am 2-15-07: no credit You may work in groups of up to 3 students. However, each student must make contributions to the answers. Questions Points possible Your score 1 18 2 15 3 12 4 30 5 15 6 10 Total: 100
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Question #1 (18 points) Identify all chiral centers in these compounds (6 x 1point) and tell whether each structure is chiral (6 x 2points) . C C Cl H CH 3 H Cl H 3 C C C H Cl CH 3 H Cl H 3 C a) b) c) Cl d) Cl Cl Cl e) f) Cl Cl Cl Cl * * * * * * * * Chiral Chiral Achiral Achiral Achiral Achiral
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Question #2 (15 points) How is each compound related to A? Is it an enatiomer, diastereomer, or identical? (5 x 3points) Cl A Cl a) b) Cl Cl c) d) Cl e) Cl diastereomer enantiomer diastereomer enantiomer identical
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Question #3 (12 points) For each of the following compounds assign E or
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Unformatted text preview: E or Z . (4 x 3points) a) b) Cl Cl Cl c) Cl d) OH Cl E E Z Z Question #4 (30 points) For each of the following compounds assign R or S to each stereocenter. (10 x 3points) a) C H Br H 3 CH 2 C b) Cl C H D H 3 C OH c) C C CH 3 H 3 CH 2 C Br H CH 3 D d) C CH=CHCH 3 H 3 C C CH 2 CH 3 HC e) C C CH 3 H 3 C H HO OH H f) Cl g) Cl O S R S S R S R S R R Question #5 (15 points) Label each asymmetric center as either R or S . (5 x 3points) Cl H 3 CO OCH 3 N H N N HO H HO CH 3 CH 3 O O S S R R R R S Question #6 (10 points) Two enantiomers A and B can be separated by any conventional method such as crystallization or chromatography. Show the strategy for separating enantiomers A and B as an example. NH 2 NH 2 Enantiomers A B 1) diastereomers or 2) diastereomeric salts or 3) tansient diastereomeric interactions use of stationary phase HN O R HO vs HN O R HO NH 3 R CO 2 OH vs NH 3 R CO 2 OH R CO 2 OH separation...
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  • Spring '07
  • Unknown
  • Chemistry, NH, Enantiomer, Cl H Cl

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