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Natural Science Forum / Chemistry / Organic Synthesis / April 2007


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proton NMR27 Apr 2007 18:04 GMT3
I am having trouble understanding the H NMR for 5-norbornene-2,3-
dicarboxylic anhydride (to see it, please see:
http://www.aist.go.jp/RIODB/SDBS/cgi-bin/direct_frame_top.cgi?lang=eng).
To begin with, I don't understand why H's D and E are labelled as non-
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