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un decoupled 13c nmr and off resonance , Is there any other carbon NMR experiment one...

un decoupled 13c nmr and off resonance , Is there any other carbon NMR experiment one can carry out that will provide the same information? list the name the experiment ?

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Answer #1

As you may know, carbon peaks in NMR are split by neighbouring H atoms. In decoupled NMR, the peak splitting is removed.But in off-resonance decoupling the C-H couplings are retained so that the peaks split. This gives information on how many H atoms are in the vicinity of the C atom to which the peak belong to.

There is another variation of NMR called DEPT (Distortionless enhancement by polarization transfer). This allows to differentiate between CH, CH2 and CH3 groups.

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