Ammonium Pertechnetate in Mixtures of Trifluoromethanesulfonic Acid and Trifluoromethanesulfonic Anhydride.

ABSTRACT: Ammonium pertechnetate reacts in mixtures of trifluoromethanesulfonic anhydride and trifluoromethanesulfonic acid under final formation of ammonium pentakis(trifluoromethanesulfonato)oxidotechnetate(V), (NH₄ )₂ [TcO(OTf)₅ ]. The reaction proceeds only at exact concentrations and under the exclusion of air and moisture via pertechnetyl trifluoromethanesulfonate, [TcO₃ (OTf)], and intermediate Tc^VI species. ⁹⁹ Tc nuclear magnetic resonance (NMR) has been used to study the Tc^VII compound and electron paramagnetic resonance (EPR), ⁹⁹ Tc NMR and X-ray absorption near-edge structure (XANES) experiments indicate the presence of the reduced technetium species. In moist air, (NH₄ )₂ [TcO(OT

SUBMITTER: Zegke M 

PROVIDER: S-EPMC9299680 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature