Can you from a NMR diagram see how an ester is turning? (where is the biggest shielding; the hydrogens that see the carbon on the ester or the hydrogens that see the oxygen on the ester.)

Question

frostbite · Answer

@Preetha

frostbite · Answer

H-NMR by the way.

chmvijay · Answer

what exactly you want

chmvijay · Answer

ester turning to what

frostbite · Answer

The following an example.
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frostbite · Answer

Well my question is what carbon attached to the ester group is most shielded when we do NMR?

chmvijay · Answer

hydrogen that sees the carbon more is shielded

frostbite · Answer

Why is that? I mean the oxygen is more electronegative and closer?

chmvijay · Answer

yaaa exactly right
if hydrogen is near More electronegative it pulls all the electron density from H and H is less shielded

frostbite · Answer

Right. Well thank you, the master students here were unsure and said it might not even be measurable.