Can any one tell me about Polyglycolic acid polymers NMR peak in HFIP(normal)/CDCl3 solution ?

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Jani Rahkila

You should only be getting one peak. What is the ratio of the peaks?

Could the other peak be residual glycolide?

Does the CHCl3 peak look normal, or could the two peaks be caused by poor shimming?

Can you run a 13C spectrum to verify that you actually have two peaks?

Yamini Sharma

I recorded NMR in CDCl3/HFIP: 1/1 ratio. I am getting only one peak between 4.9 to 4.8 ppm. it is not a single peak it's a kind of broad peak.