Upon feedback from readers of our website, one of the changes we have decided to make is to feature a wider range of subjects from which to draw questions for our Problem of the Week series, which has been very popular over the past year. So, for this week’s problem, enjoy a Chemistry question from a past Cambridge Chemistry Challenge Paper.


For each structure, label each unique carbon environment using the same label for equivalent atoms. Hence predict how many peaks would be seen for each compound in the 13C NMR spectrum.

Source: C3L6 2020

Happy solving!

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