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Problem 5: Determine the correct structure from the provided structures and write this structure in the box provided on the NMR spectrum. Students are provided the 'H and C NMR data to use as additional information to solve this problem. 95 CHI MON NH Structure A Structure B Structure C Structure D Draw the correct structure in the provided box for full credit HA H. Ho HE 'H NMR 6.8 ppm 6.1 ppm 5.9 ppm 3.5 ppm 2.0 ppm Splitting Integration Doublet Doublet 6 Singlet 6 Singlet 24 Singlet 18 C13 CA C Co 146 ppm 145 ppm 131 ppm 113 ppm 106 ppm 102 ppm 102 ppm DEPT-135 No signal No signal Positive No signal Positive Positive Positive HA Hulle Ho T 7 T 1 11 10 9 8 6 5 4 T 2 3 0 ppm NMR Problems