The 2H field/frequency lock commonly found on F.T.n.m.r. spectrometers provides a simple but precise method for the measurement of deuterium chemical shifts relative to the corresponding proton shifts; results are reported for a number of systems, and appreciable isotope effects are observed with non-hydrogen bonded protons.
D. F. Evans, J. Chem. Soc., Chem. Commun., 1982, 1226 DOI: 10.1039/C39820001226
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