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Deuterium nuclear magnetic resonance spectroscopy. 1—Larmor frequency ratio, referencing and chemical shift
Author(s) -
AlRawi Jasim M. A.,
Behnam George Q.,
Taha Nihad I.
Publication year - 1981
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/mrc.1270160306
Subject(s) - larmor precession , deuterium , proton , chemical shift , nuclear magnetic resonance , chemistry , nuclear magnetic resonance spectroscopy , spectroscopy , spectral line , analytical chemistry (journal) , deuterium nmr , magnetic field , atomic physics , physics , nuclear physics , quantum mechanics , astronomy , chromatography
Precise values for the ratio of the Larmor frequencies, w 1H / w 2H , were measured at constant field for various organic compounds. The values of the Larmor frequency ratio depend on carbon‐hydrogen bond hybridization. The best ratio for the ghost referencing of 2 H NMR spectra was then determined (6.514399862). This value enables an accurate ghost reference for any 2 H NMR spectrum to be derived from the observed 1 H NMR frequency of the normal internal reference. Deuterium and proton chemical shifts measured from internal, partially deuteriated TMS under the same conditions are shown to be the same.