Abstract
N,N-dimethylformamide (DMF) containing electrolytes were investigated using 17O, 13C and 1H nuclear magnetic resonance. All chemical shifts are affected by the cations. According to the results of ab initio calculations on 1:1 DMF-cation complexes it can be concluded that the changes of 17O and 13C chemical shifts are due mainly to changes in the p-electron populations induced by the cations. The change of the magnetic anisotropy of the carbonyl group affects significantly the proton chemical shifts. The effect of zinc ion on the 17O, 13C and 1H chemical shifts is different from that of alkaline and alkaline earth metal ions. Line broadening of 17O signals by electrolytes due to viscosity changes is also observed.
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