FTIR and NMR studies of bis(oxaalkyl) sulphates(IV) and their complexes with proton and some metal cations.

The complexation of Li+ and Na+ cations by three bis(oxaalkyl) sulphates(IV) was studied by FTIR and NMR on 1H, 13C, 7Li and 23Na nuclei. The NMR results have proved the formation of complexes and the fluctuation of Li+ and Na+ cations in respective circular arrangements. In the FTIR spectra of protonated sulphates intense continuous absorptions were observed indicating fast fluctuation of the protons in the respective multiminima potentials. The continuous absorptions in the far infrared region of the FTIR spectra of Li+ or Na+ complexes with three bis(oxaalkyl) sulphates(IV) indicate fast fluctuations of Li+ or Na+ cations between O-atoms of the oxaalkyl chains. The independence of the shape of the continua on the length of the oxaalkyl chains, i. e. the number of minima in the multiminima potential, demonstrates that the fluctuation of cations occurs in the respective circular arrangements. [Copyright &y& Elsevier]