Oxygen Isotope Shifts in 17O NMR Spectra of the Uranyl Ion

The 17O NMR spectrum of uranyl oxygens enriched with 17O gave three peaks. These peaks are assigned to the signals of three isotopomers, [16O=U=17O]2+, [17O=U=17O]2+, and [18O=U=17O]2+. Chemical shifts for the signals of [17O=U=17O]2+ and [18O=U=17O]2+ were −0.054±0.002 and −0.108±0.002 ppm relative to [16O=U=17O]2+, respectively.