Spectroscopic evidence for the direct coordination of the pertechnetate anion to the uranyl cation in [UO2(TcO4)(DPPMO2)(2)](+)

Sutton AD; John GH; Sarsfield MJ; Renshaw JC; May L; Martin LR; Selvage AJ; Collison D; Helliwell M

Inorganic Chemistry, Vol.43, No.18, 5480-5482, 2004

Sutton AD, John GH, Sarsfield MJ, Renshaw JC, May L, Martin LR, Selvage AJ, Collison D, Helliwell M

We report the synthesis and structural characterization Of PO2(ReO4)(DPPMO2)(2)][ReO4] and [UO2(Cl)(DPPMO2)(2)][Cl] (where DPPMO2 = bis(diphenylphosphino)methane dioxide). In both complexes, the linear uranyl dication is coordinated to two bidentate DPPMO2 ligands in the equatorial plane with one coordinated and one non-coordinated anion (either perrhenate or chloride). We have also prepared the pertechnetate analogue, and, through P-31 and Tc-99 NMR, we have shown that the cation, [UO2(TcO4)(DPPMO2)(2)](+), is stable in solution.