NMR frequency and magnetic dipole moment of (3)He nucleus.
We present new gas-phase NMR spectra which relate the resonance frequency of (3)He nucleus to the resonance frequency of the proton in tetramethylsilane (TMS). We discuss the dependence of (3)He resonance frequency on the density of the solvent gas, and we consider in detail the absolute shielding scales of both nuclei. Finally, we analyse the accuracy of the results, using the relationship between the resonance frequencies, absolute shielding constants and magnetic dipole moments of (1)H and (3)He nuclei.
Jackowski
Karol
K
Laboratory of NMR Spectroscopy, Faculty of Chemistry, Warsaw University, Pasteura 1, 02093 Warsaw, Poland. kjack@chem.uw.edu.pl
Jaszuński
Michał
M
Kamieński
Bohdan
B
Wilczek
Marcin
M