Coupling between hydrogen and deuterium can often be difficult to observe because of the quadrupole on deuterium. However, coupling can be observed in some systems, such as in acetone-d5.
The figure below contains the NMR spectrum for acetone-d5. The nuclear spin of deuterium is 1. This means that the proton signal is split into 5 parts.
Figure. NMR spectrum of acetone-d5.
Coupling between carbon and deuterium is readily observable.
The figure below contains the NMR spectrum for chloroform-d. The nuclear spin of deuterium is 1. This means that the carbon signal is split into 3 parts.
Figure. NMR spectrum of chloroform-d.
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