B 0 Complete the assignments for lH NMR in the following table. The NMR\'s provi
ID: 528793 • Letter: B
Question
B 0 Complete the assignments for lH NMR in the following table. The NMR's provided below are "real" spectra. That is, they have not been "air-brushed" to remove "blemishes". Thus, you will observe more peaks in the spectra that you would expect from the product alone. It is important for you to be able to decide which peaks are from "other" molecules and to be able to identify them based on what other species might be expected to be present. This one is a little trickier that the one analyzed for benzoin. Hh Han He Hd NMR nuclei observed: H1 Solvent: CDC NMR field strength: 400MHz 3500 2500 1500 7.5 6.5 6.0 5.5 5.0 4.0 35 3.0 2.0 1.5 1.0Explanation / Answer
A-extraneous
B-Hc and Hb
C=Hd,Hf
D-Ha,Hl
E-Hj, He
From the above spectrum and a comparison of the structure peaks A and B lok like the artefact of the experiment
The other peaks are based on the proximity of the protons to the carbonyl group.
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