PMR spectra of H5O2+ ion of yttrium acid oxalate trihydrate YH5O2(C2O4)2xH2O

PMR spectra of polycrystalline (YH(C2O4)2 x x3H2O, prepared on the the spectrometer of low resolution in the range of temperatures of 80-293 K are analyzed. It is established that PMR spectra mainly agree with the structure structure of acid yttrium oxalate trihydrate, which is determined using other methods. H5O2+ groups and isolated water molecules are reliably differentiated. The alteration of the PMR line in the range of temepratures of 80-293 K proves the fact that the structure of the hydrate investiagted becomes disordered as regards H5O2+ ions at temeperatures above 118 K. This transition is of a dynamic character. In the range of temeperatures lower than 118 K the PMR spectrum permits to suppose that H5O2+ groups is an aqua oxonium