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Assign the proton NMR spectrum of L-phenylalanine, acquired in D2O solvent (some H2O is present; it's the tallest peak!). Briefly explain your assignments, taking into account expected chemical shifts and coupling. Note that this is a chiral molecule, which makes some hydrogens diastereotopic, i.e., not equivalent. Recall that exchangeable protons (i.e., those involved in acid-base reactions) will usually not show up in a spectrum recorded in D2O. The bottom spectrum is a zoomed-in portion of the peaks in the 3-4 ppm region. OH NH2

          
            Assign the proton NMR spectrum of L-phenylalanine, acquired in D2O solvent (some H2O is present; it's the tallest peak!). Briefly explain your assignments, taking into account expected chemical shifts and coupling.

Note that this is a chiral molecule, which makes some hydrogens diastereotopic, i.e., not equivalent. Recall that exchangeable protons (i.e., those involved in acid-base reactions) will usually not show up in a spectrum recorded in D2O. The bottom spectrum is a zoomed-in portion of the peaks in the 3-4 ppm region.

OH NH2

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assign the proton nmr spectrum of l phenylalanine acquired in dzo solvent some hzo is present it s the tallest peak briefly explain your assignments taking into account expected chemical shi 85186

Added by Brittany T.

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Step 1

First, we need to identify the different types of protons in L-phenylalanine. There are three main groups: the aromatic protons (5 protons), the alpha proton (1 proton), and the beta protons (2 protons). Show more…

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