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I have problems with interpreting this NMR spectrum. First of all, I don't know how to calculate J(Hz) values. I'm not sure I got integrated...

I have problems with interpreting this NMR spectrum. First of all, I don't know how to calculate J(Hz) values. I'm not sure I got integrated intensity right.As you see attached picture, I can assume peak 2 and 3 has two hydrogens. Peak 2 has hydrogen D and F since it's close to carboxylic acid but I don't know which peak is which and get each chemical shift.I can also assume peak 3 has hydrogen E and G but again, I don't know which peak is which. I'm pretty sure peak 5 is H. The most tricky part is I have no idea about Hydrogen C and DPlease help me how to interpret this NMR spectrumThank you.

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The Wittig Reaction NMR AssignmentName_____________________________________________ TA___________________________________________Section_______________________________________Hd Hc O He O Ha C H...
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