L11 - Weeks 10-13(Schedule Week#10 Oct 25#11 Nov 1#12 Nov 8#13 Nov 15 Nov 22 Experiments 4/5/6/7 Post-Lab Exp 4 due Finish Exper 5 Start Exper 6

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Weeks 10-13 (Schedule) Week # Experiments 4/5/6/7 #10 Oct 25 Post-Lab Exp 4 due Finish Exper 5 Start Exper 6 Prelab Exp 6 due #11 Nov 1 Post-Lab Exp 5 due Continue Exper 6 NO LAB LECTURE NEXT WEEK #12 Nov 8 Finish Exper 6 Start Exper 7 Prelab Exper 7 due NO LAB LECTURE THIS WEEK #13 Nov 15 Post-Lab Exp 6 due Continue Lab 7 Nov 22 Fall Break Regrade Policy Regrades Are Due This Week In Lab Section Regrades Due in your lab section one week after they are handed back (i.e., during the week of Nov 1). No regrades will be considered beyond this time. Regrading policy : If you plan to submit a regrade request, do not write on your graded exams for any reason after they are returned. Exams submitted for regrade consideration must include a cover sheet, stapled to the exam, stating specifically which problems you feel were misgraded and why. Arithmetic errors in adding up points will be corrected immediately; no cover sheet is needed. Any other regrade request will cause the entire exam to be regraded, and your overall score on the exam may therefore either increase or decrease. NMR Pointers from the TA’s Please remove the filters and don’t write on the caps Make sure that your compounds are very dry to minimize water peak If your sample is wet, the water and benzyl alcohol OH peaks will overlap Don’t get confused by water, solvent, or impurity peaks know what to expect in a spectrum and look for it Page 1
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A Selection of “Dr. K’s Rules” (Actually, the rules of any experienced organic chemist) If your product is cloudy, it is probably wet, so dry it again (dissolve, filter if needed, dry, filter) If it is solid, recrystallize it (if you can) and take a melting point If your product does not dissolve in organic solvent, try water. If it dissolves in water, it is probably NOT your product, but some salt! Check your saved extracts for your true product, or . . . . If you don’t see the expected peaks in the IR or it is too weak, try taking the spectrum again If your NMR looks bad, check with TA about getting another sample run Experiment 6: Multistep Synthesis of Fragrances Aldehydes: Alcohols: This Week Next Week Carbonyl Aldehyde Ketone Ester Amide Acid Page 2
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This note was uploaded on 11/19/2010 for the course CHEM 237 taught by Professor Wilson during the Fall '08 term at University of Illinois, Urbana Champaign.

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L11 - Weeks 10-13(Schedule Week#10 Oct 25#11 Nov 1#12 Nov 8#13 Nov 15 Nov 22 Experiments 4/5/6/7 Post-Lab Exp 4 due Finish Exper 5 Start Exper 6

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