Question

Select the reason why deuterated benzene, C6De, is often used as a solvent in NMR spectroscopy. its 2H atoms do not interfere with the sample signal it dissolves a wide array of compounds its H atoms enhance the sample signal it has a low polarity O O O

Answer 1

1. NMR spectrometers use deuterium signal to keep magnetic field constant.
2. Deuterated solvents are used in proton NMR because the resonance frequency of a deuteron (²H) is very different from that of proton (¹H). Therefore, one would not have to worry about peaks from the solvent in the proton NMR spectrum. If you use non deuterated solvent you will see only a giant signal in hydrogen NMR spectra from solvent.
3. Also as there is always much more solvent than substance of interest in the sample to be investigated, one uses a deuterated solvent instead of the ordinary 1H-containing solvent to avoid the huge solvent absorption that would otherwise spoil the 1H-NMR spectrum.

Answer: Its ²?H atoms do not interfere with the sample signal.