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Sulphur-33 and oxygen-17 NMR studies of sulpholane in acetic acid and related solvents

✍ Scribed by Ahmed A. M. Ali; Robin K. Harris; Peter S. Belton

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
552 KB
Volume
28
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

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.

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