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Sulphur‐33 and oxygen‐17 NMR studies of sulpholane in acetic acid and related solvents
Author(s) -
Ali Ahmed A. M.,
Harris Robin K.,
Belton Peter S.
Publication year - 1990
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.1260280408
Subject(s) - chemistry , trifluoroacetic acid , protonation , acetic acid , sulfur , nmr spectra database , oxygen , spectral line , nuclear magnetic resonance spectroscopy , line width , oxygen 17 , carbon 13 nmr , proton nmr , relaxation (psychology) , analytical chemistry (journal) , organic chemistry , nuclear magnetic resonance , ion , social psychology , psychology , physics , astronomy , optics
Sulphur‐33 NMR spectra were obtained for sulpholane in acetic acid, trifluoroacetic acid, methyl acetate and methyl trifluoroacetate over the entire solution range and at a variety of temperatures. Oxygen‐17 NMR spectra were recorded for both components of each solution. The line width and chemical shift data are discussed in terms of molecular interactions and viscosity variations. Some variable‐temperature measurements are included, as are some values of 13 C spin‐lattice relaxation times. It is concluded that there is an interaction, probably protonation, between sulpholane and trifluoroacetic acid, although occurring to only a small extent, which is not shown by the other solutions. The 33 S and 17 O line widths of sulpholane are peculiarly sensitive to the interaction.