Abstract
The coefficient σ1 describing the linear dependence of proton magnetic shielding on density has been measured for the gases CH4, C2H6, C2H4, CH3F, CH2F2, CHF3, and H2S at 20° C for some other temperatures. Measurements were made at 220 MHz. Corrections for bulk susceptibility give fairly good agreement with earlier values but make clear that existing susceptibility data are inadequate for making these corrections precisely. A temperature variation of σ1 is detectable for all the gases except methane.
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Smith, A., Raynes, W.T. Studies of the density dependence of proton magnetic shielding in gases. Journal of Crystallographic and Spectroscopic Research 13, 77–87 (1983). https://doi.org/10.1007/BF01246577
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DOI: https://doi.org/10.1007/BF01246577