If the reaction doesn't go to completion, you will have aldehyde starting material present. how would you identify this impurity most easily by 1h nmr?

Question

Jamiya Phillips

Chemistry

15 August, 07:42

If the reaction doesn't go to completion, you will have aldehyde starting material present. how would you identify this impurity most easily by 1h nmr?

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Killian Waller · Answer 1

- If the reaction does not go to completion, the presence of aldehyde can be identify easily by looking at the aldehydic proton peak in the range of 10 - 9 ppm (Chemical shift value).

- Aldehydic proton has a high value of chemical shift due to magnetic anisotropy so when looking at the most de-shielded proton we will found a signal or peak at 9-10 ppm corresponding to the proton of aldehyde