Worksheet: Attached Proton Tests

In this worksheet, we will practice interpreting attached proton test (APT) or distortionless enhancement by polarization transfer (DEPT) spectra.

Q1:

Which of the following NMR peaks would distortionless enhancement by polarization transfer (DEPT) allow to be distinguished from one another?

  • AHydroxyl groups from amine groups
  • BOrtho-, meta-, and para-substituent groups on a benzene ring
  • CMethylene groups from methyl groups
  • DAromatic carbons from aliphatic carbons

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