You are given an impure sample of a phenol and asked to purify it. You ask for i

Question

1. You are given an impure sample of a phenol and      asked to purify it.  You ask for      information about the suspected impurities, but it seems no one really      knows.  So you ask for an IR/NMR      spectra of the impure sample.  Upon      scrutinizing the IR spectrum carefully, you find that there is a small,      but significant, signal at about 1700 cm-1, a small broad peak      at about 3000 cm-1 and a much stronger broad peak centered at      about 3580 cm-1.  That      gives you an idea about the nature of the impurity, so you scrutinize the 13C      NMR spectrum, looking for a short signal at ~170 ppm- you find it.  You then look for a signal in the 10-13      ppm range in the 1H NMR spectrum- there seems to be a little      

Explanation / Answer

IR---1700 and 3000 cm-1 carboxilic acid,,,, 3580 intra molecular O-H Freqe                                                                                                  NMR- 11.5 hydrogen attached to acid group                                            B.)purification would probably pending previous tests result in precipitating out the N complex and filtering. Other methods might include a distillation ( alcohols boil off very quickly so it's an easy way to purify alcohols)

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