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On each the following IR spectra, circle and indicate the most important stretching signal from the following choices:N-H, O-
18. Draw the structures of Compound 18a. and 18b. (18 pts), clearly indicate your assignments of all proton resonances (8 pts
C-OR Characteristic IR Stretching Frequencies in cm broad N-H 0-H CEN (3000-3500) (2200-2400) 4000 3000 2000 (1150-1300) 요 RC
List of Reagents Inox o KMnOH SO Fe, HCI H, Lindlars catalyst H, PC KMnO., NaOH, H20, cold KMnO., NaOH, H:0, heat LEATH Å 00
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