Mr. Saikia,

There is authomated siftware for assignment.

Hi Lakhinath,

Your compound has the structure A, a secondary aromatic amine (broad signal at 6.35 ppm), that does a H - D exchange, please integrate the signals after the D2O exchange experiment.

1H and 13C-NMR predictions can be done with software like: ChemDraw, MNOVA, ACD, check closely the 13C spectra.

See attached the ChemDraw predicted spectra and assignments.

It is Structure A, because A has 6 aromatic protons and a broad signal from NH. Strcuture B would have 7 aromatic protons and does not have NH.

Thanks all for your response. My expected product is also A. However, I am a little bit confused as the peak at 6.41 ppm is not undergoing D2O exchange as you can see. I took the spectra in DMSO-d6.

And it seems to be a doublet too when expanded. Please revisit.

You can do on IR, that will give you the N-H stretch.

Yes, that is an option. Using IR. I will do it. thanks.

Agree with Marius Pelmus .