Question

6. The NMR spectra of 2-methylpentanedioic acid are given below. CLEARLY MARK YOUR ANSWERS a. Integrate each set of peaks on the spectrum, except for the peak at 11 ppm, and write the number of hydrogens for each integral above each integral. There are two integral values in the cluster of peaks 2.4-2.6 ppm. (5 pts) b. Based on the numbering scheme below, assign all H and C with their appropriate peaks. Write the number of the C or H BELOW the peak. (6 pts for Hydrogen + 5 pts for Carbon = 11 pts) 4 O HO 2 3 5 2 OH 1 CH3 1 6 Wavenumber (cm-1) 1H NMR 300 MHz x64 12 11 ppm 2.6 2.4 2.2 2.0 1.8 1.6 1.4 1.2 ppm 13C/DEPT NMR 75.5 MHz 180 170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 ppm

          6. The NMR spectra of 2-methylpentanedioic acid are given below. CLEARLY MARK YOUR ANSWERS

a. Integrate each set of peaks on the spectrum, except for the peak at 11 ppm, and write the number of hydrogens for each integral above each integral. There are two integral values in the cluster of peaks 2.4-2.6 ppm. (5 pts)

b. Based on the numbering scheme below, assign all H and C with their appropriate peaks. Write the number of the C or H BELOW the peak. (6 pts for Hydrogen + 5 pts for Carbon = 11 pts)

4
O
HO 2 3
5 2 OH
1
CH3 1
6

Wavenumber (cm-1)
1H NMR 300 MHz
x64
12 11 ppm
2.6 2.4 2.2 2.0 1.8 1.6 1.4 1.2 ppm
13C/DEPT NMR 75.5 MHz
180 170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 ppm

6. The NMR spectra of 2-methylpentanedioic acid are given below. CLEARLY MARK YOUR ANSWERS

a. Integrate each set of peaks on the spectrum, except for the peak at 11 ppm, and write the number of hydrogens for each integral above each integral. There are two integral values in the cluster of peaks 2.4-2.6 ppm. (5 pts)

b. Based on the numbering scheme below, assign all H and C with their appropriate peaks. Write the number of the C or H BELOW the peak. (6 pts for Hydrogen + 5 pts for Carbon = 11 pts)

4
O
HO 2 3
5 2 OH
1
CH3 1
6

Wavenumber (cm-1)
1H NMR 300 MHz
x64
12 11 ppm
2.6 2.4 2.2 2.0 1.8 1.6 1.4 1.2 ppm
13C/DEPT NMR 75.5 MHz
180 170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 ppm

Added by Jennifer B.

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