There are three reasons why deuterated solvents are utilized as a part of NMR spectroscopy.
Clarification:
Reason 1: To abstain from overwhelming by the dissolvable flag.
There is normally significantly more dissolvable than test in a NMR tube.
A customary proton-containing dissolvable would give a gigantic dissolvable assimilation that would overwhelm the 1H-NMR range.
Most 1H-NMR spectra are in this manner recorded in a deuterated dissolvable, on the grounds that deuterium particles ingest at a totally unique recurrence.
In any case, deuteration is never total, so in CDCl3, for instance, there is constantly some lingering CHCl3.
You generally get a dissolvable flag from CHCl3 at 7.26 ppm.
Reason 2: To balance out the attractive field quality.
The field quality of superconducting magnets tends to float gradually.
Present day NMR spectrometers measure the deuterium retention of the dissolvable and modify the field quality to keep the reverberation recurrence (field quality) consistent.
Reason 3: To precisely characterize 0 ppm.
The contrast between the deuterium recurrence and 0 ppm (TMS) is notable.
Present day spectrometers can "bolt" onto the deuterium flag, so the expansion of an interior reference like TMS isn't normally required
Ref: https://socratic.org/questions/why-does-nmr-use-deuterated-solvents
