143B%20Exam-2-WI-11-Key

143B%20Exam-2-WI-11-Key - Chemistry 143B Winter, 2011 NAME:...

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Chemistry 143B Winter, 2011 Exam #2 (2-15-11) Total Points: 100 NAME: Ima Key PID: ____________________________ ID Checker Initials: _____________________ TA Name: ___________ ____________ USE INK FOR RECORDING ANSWERS (if using pencil, no re-grades will be allowed) 1. (23 points) For the following reaction, draw all the possible products for each step. Be sure to indicate the correct stereochemistry where appropriate and designate stereocenters by “R” and “S”. Also, designate any alkenes by the correct “E” or “Z”. Finally, if more than one product is formed in any step, describe the stereochemical relationship between the products. H Ph Ph H Br 2 R S Br Br Ph Ph H H Br Br Ph H H Ph R Ph Br Ph H S KOH 25 o C Z 5 pts each structure 1 pt each R, S, Z (5 total) 3 pts "enantiomers" enantiomers
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2. (8 points) Draw the structure of the expected products. Do NOT draw the structure of “A”. HO
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This note was uploaded on 03/04/2012 for the course CHEM 143b taught by Professor Staff during the Spring '08 term at UCSD.

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143B%20Exam-2-WI-11-Key - Chemistry 143B Winter, 2011 NAME:...

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