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Temperature dependence of NMR secondary references for D 2 O and (CD 3 ) 2 SO solutions
Author(s) -
Hoffman R. E.,
Davies D. B.
Publication year - 1988
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.1260260617
Subject(s) - chemistry , chemical shift , analytical chemistry (journal) , tetramethylammonium , sodium , trimethylsilyl , line (geometry) , inorganic chemistry , organic chemistry , ion , geometry , mathematics
Chemical shifts of secondary references for D 2 O and (CD 3 ) 2 SO solutions were measured as a function of temperature. The 1 H and 13 C chemical shifts of dioxane, sodium 4,4‐dimethyl‐4‐silapentanesulphonate, HOD, tetramethylammonium chloride and sodium 3‐(trimethylsilyl)propionate‐ d 4 in D 2 O solution were measured relative to external TMS and the chemical shifts of (CD 3 ) 2 SO and H 2 O were measured in (CD 3 ) 2 SO solution relative to internal TMS. For accurate comparison of chemical shifts it is necessary to take into account the sample temperature and, therefore, the temperature dependences of 1 H and 13 C chemical shifts of a number of secondary references have been determined accurately and fitted to a parabola or straight line, as appropriate.