Microsoft PowerPoint - 13A

Microsoft PowerPoint - 13A - What is the absolute...

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1. S, S 2. S, R 3. R, S 4. R, R 5. S, S, R, S 6. S, S, S, R 7. S, R, R, S 8. S, R, S, R 9. R, R, R, S 10. R, R, S, R What is the absolute configuration of each chiral center (from left to right)? 10% 10% 10% 10% 10% 10% 10% 10% 10% 10% * * 0. 180 4pts 2pts 1pt 2pts 1pt S S 2pts 2pts
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Summary of Critical Points from Last Class C H Br I Cl H C I Cl Br Each chiral center has two possible “configurations” * RIGHT HANDED (R for rectus ) LEFT HANDED (S for sinister ) R S This means there are two types of trans S S R R not identical
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Summary of Critical Points from Last Class H 3 C C C H 2 H HO CH 3 * * 1 4 2 3 1 4 2 3 CH 3 C C H 2 H HO H 3 C H 3 C C C H 2 H HO CH 3 1 4 2 3 1 4 2 3 CH 3 C C H 2 H HO H 3 C H C CH 3 H 3 CH 2 C OH 1 2 3 4 H C CH 3 H 3 CH 2 C OH 1 2 3 4 * To determine if a chiral center is R or S… At first work with both a model and a drawing! Number atoms attached to chiral center based on atomic number Point thumb in direction of smallest (#4) Match finger curl to #1 – to – #2 – to – #3 progression R S R
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Priority Tie Breaker “Card Game” 1 4 * C O O H Double bond means you count oxygen twice! 2
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This note was uploaded on 07/29/2009 for the course ENGL engl 500 taught by Professor Reter during the Spring '09 term at University of Washington.

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Microsoft PowerPoint - 13A - What is the absolute...

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