143B%20Exam-1-WI-11-Key

143B%20Exam-1-WI-11-Key - Chemistry 143B Winter 2011 NAME...

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Chemistry 143B Winter, 2011 Exam #1 (1-25-11) 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. (30 points) An analog of tacrolimus, a powerful immunosuppressive agent that conrols the rejection of transplanted organs in human patients, is depicted below. Refer to this structure to answer the questions that follow. O N O O O OCH 3 OH H 3 CO OH H 3 CO OH 1 2 3 4 5 6 O O 7 8 9 10 3 pts each answer (12 points this page) *The approximate 13 C NMR shift of carbon #3 in ppm is: ca. 200-210 *The approximate IR stretching frequency of the bond between carbon #2 and #8 is: ca. 2000-2300 cm-1 and the strength of the peak is (circle one): weak *Which IR stretching frequency would have a higher wavenumber (circle)? carbonyl at carbon #6 carbonyl at carbon #9
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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-1-WI-11-Key - Chemistry 143B Winter 2011 NAME...

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