Synthesis and characterization of cationic technetium complexes of 1,2-bis(dimethylphosphino)ethane (DMPE). Structure determinations of trans-[TcV(DMPE)2(OH)(O)](F3CSO3)2, trans-[TcIII(DMPE)2Cl2]F3CSO3, and [TcI(DMPE)3]+ using x-ray diffraction, EXAFS, and technetium-99 NMR

摘要: Three distinct cationic complexes of technetium, containing Tc(V), Tc(III), and Tc(I) centers, have been prepared by reduction pertechnetate with bis(1,2-dimethylphosphino)ethane (DMPE). Careful control reaction conditions allows the synthesis any one three trans-complexes in greater than 90% yield. All characterized visible-, uv-, ir-spectrophotometry, elemental analyses, high-performance liquid chromatography. The complex has additionally /sup 31/P 99/Tc NMR, as well a new type extended x-ray absorption fine structure analysis (EXAFS), which show that this is an octahedral species Tc-P bond length 2.40A. Tc(V) Tc(III) single-crystal analyses.