MARKIYAN DOLIBA




2-amino-3-hydroxy-propanoic acid (serine)

Empirical Formula : C3H7NO3

There are two expected parts that do not show up in this NMR spectrum. The hydroxyl group is one of them. This group should show up around 10-12ppm, but due to the chart only going up to a little over 10.5ppm, this is not seen. Also the amine group will not be seen, because they will be exchanged while in the solvent. They would have peaks around 2-5 ppm if seen.

gen1.jpg
gen1.jpg



There is one huge peak around 4.9 which could account for Deuterium oxide, D2O, which was used as a solvent here. By using D2O, the NH2 and OH groups on the compound will not be visible in the spectrum.

Looking closer there are a range of peaks around the 3.8-4.1ppm range. The grouping of 4 larger peaks with 4 smaller ones coincide with the –CH2- group next to the OH. Each of the hydrogens on this carbon contain a doublet of doublets. Since the center carbon is chiral, each of the H on the –CH2- will produce 4 peaks through a doublet of doublets. The 4 remaining peaks seen lower can account for the H off of the chiral Carbon. Since the center carbon is chiral it allows for this H to have a doublet of doublets producing 4 peaks. All of these peaks are within the 3-4 ppm expected region due to the interactions with the OH, NH2, and COOH groupings.

spec4.jpg
spec4.jpg

The peaks seen below are on the C-NMR spectrum in the 50 to 75ppm range. This shows this way, because there are carbons which are connected to groups such as the OH and COOH, which tend to produce peaks around the 50-90ppm range normally. The larger peak in the 53-75 ppm range will be due to the CH2 bonded onto the the OH group. It seems to be this one, due to the fact that its hydrogens in the H-NMR are more desheilded. There is also a peak around 175ppm which can be due to the C=0 which usually shows up around 160-210ppm range.

spec2.jpg
spec2.jpg


[looks good JCB]

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