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proton NMR

proton NMR - Organic Chemistry Forum

proton NMR - Organic Chemistry Forum

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Old 04-11-2007, 02:58 PM
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Default proton NMR

I am having trouble understanding the H NMR for 5-norbornene-2,3-
dicarboxylic anhydride (to see it, please see:
[Only registered users see links. ]).

To begin with, I don't understand why H's D and E are labelled as non-
identical hydrogens, when you only see one peak for D/E on the
spectrum. I am also unclear as to why you can't see the difference
between B and C on the spectrum (they are merged into one peak, when
it seems that B is closer to the electronegative =O than C, and thus
more deshielded).

Any help would be appreciated.

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nmr , proton

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