Is it possible to make accurate assignments of C-O stretching, O-H deformation, and SO2 stretching vibrations in the IR spectrum?

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Dipankar Bhattacharyay

In IR-spectra there is always some overlap due to the neighboring groups. It gives us some idea. It is difficult to make accurate assignments. You can try to do accurate assignment only in case of pure compounds. You can have better idea using XPS. There is also lot of approximation.

Richard Murl Wing

Try deuterating to simplify the region.