Aqueous chemistry of seaborgium (Z = 106)

Seaborgium was previously eluted from cation exchange columns like its homo logs molybdenum and tungsten in 0.1 M HNO3/5 x 10(-4) M HF. Its chemical fo rm was presumably a neutral or anionic oxygen containing fluoride. However, species containing no fluoride such as SgO(4)(2-) could not be excluded. I n order to verify that fluoride complexing played a role in the previous st udy, another series of cation exchange separations was performed with 7-s ( 265)Sg in which 0.1 M HNO3 without HF was used as eluent. (265)Sg and W-169 were produced simultaneously by bombarding a Cm-248 target containing Gd w ith 124 MeV Ne-22 ions. While W-169 was eluted from the cation exchange col umns with an average chemical yield of 59%, no (265)Sg decay chain was dete cted in the eluent even though about 5 alpha alpha-correlations were expect ed. This non-tungsten like behaviour of seaborgium is tentatively attribute d to its lower tendency to hydrolyze compared to that of tungsten. In the p revious experiments with seaborgium in the presence of fluoride ions, neutr al or anionic fluoride complexes, e.g., SgO(2)F(2) or SgO(2)F(3)(-), were l ikely to be formed and were eluted from the cation exchange columns.