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Chemical shift references for 77 Se NMR spectroscopy. Selenous acid
Author(s) -
Milne John
Publication year - 1993
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260310709
Subject(s) - chemistry , chemical shift , aqueous solution , selenide , nuclear magnetic resonance spectroscopy , analytical chemistry (journal) , spectroscopy , stereochemistry , organic chemistry , selenium , physics , quantum mechanics
The temperature and concentration dépendences of the chemical shift of aqueous selenous acid were studied in order to establish a precise relationship between the shift of this convenient reference and that of dimethyl selenide. The chemical shift of saturated H 2 SeO 3 in H 2 O on the Me 2 Se shift scale at 20°C is 1300.0 ppm and its temperature coefficient is 0.094 ppm K −1 . The relationships to the chemical shifts of Me 2 Se in CDCl 3 and SeO 2 in D 2 O are also discussed. The results permit the correlation of 77 Se NMR shifts from several sources.