EPR Spectroscopy on Technetium Compounds

Abram, Ulrich; Kirmse, R.

doi:10.1524/ract.1993.63.special-issue.139

Cited by 18 publications

(3 citation statements)

References 13 publications

(14 reference statements)

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“…The purple solutions obtained during our experiments are indeed EPR‐active, and indicate the presence of transient Tc VI species, but with relatively low concentrations (see SI). The spectral parameters are close to those of nitridotechnetium(VI) complexes with OTf − ligands [51, 52] . The EPR signal disappears with the purple colour.…”

Section: Resultssupporting

confidence: 63%

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Ammonium Pertechnetate in Mixtures of Trifluoromethanesulfonic Acid and Trifluoromethanesulfonic Anhydride

et al. 2021

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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 TcVI species. 99Tc nuclear magnetic resonance (NMR) has been used to study the TcVII compound and electron paramagnetic resonance (EPR), 99Tc NMR and X‐ray absorption near‐edge structure (XANES) experiments indicate the presence of the reduced technetium species. In moist air, (NH4)2[TcO(OTf)5] slowly hydrolyses under formation of the tetrameric oxidotechnetate(V) (NH4)4[{TcO(TcO4)4}4] ⋅10 H2O. Single‐crystal X‐ray crystallography was used to determine the solid‐state structures. Additionally, UV/Vis absorption and IR spectra as well as quantum chemical calculations confirm the identity of the species.

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Section: Resultssupporting

confidence: 63%

“…The spectral parameters are close to those of nitridotechnetium(VI) complexes with OTf − ligands. [ 51 , 52 ] The EPR signal disappears with the purple colour. In parallel, the purple solution shows a strong 99 Tc NMR resonance at δ =+209 ppm, which correlates well with other hexacoordinate compounds containing TcO 3 + .…”

Section: Resultsmentioning

confidence: 99%

Ammonium Pertechnetate in Mixtures of Trifluoromethanesulfonic Acid and Trifluoromethanesulfonic Anhydride

et al. 2021

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“…In gefrorener Lo Èsung wird ein typisches axial-symmetrisches EPR-Spektrum mit jeweils gut aufgelo È sten 99 Tc-Hfs-Linien in Parallel-und Senkrechtteil erhalten. Die abgeleiteten EPR-Parameter [9] sind praktisch mit denen der Bu 4 N + -oder Ph 4 As + -Salze identisch [10].…”

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[Au(Et2dtc)2][TcNCl4] - Darstellung und Struktur

Abram

2000

Z. anorg. allg. Chem.

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[Au(Et2dtc)2][TcNCl4] – Synthesis and Structure [Au(Et2dtc)2][TcNCl4] (Et2dtc– = N,N‐diethyldithiocarbamate) is formed by the reaction of [Au(CO)Cl] with [TcN(Et2dtc)2] in dichloromethane. The solid state structure of the compound is characterized by a large triclinic unit cell (space group, P1, a = 9.422(2), b = 22.594(5), c = 32.153(7) Å, α = 72.64(1), β = 85.19(1), γ = 86.15(1)°, Z = 12) and shows an unusual arrangement due to long‐range contacts between the technetium atoms and sulfur atoms of the [Au(Et2dtc)2]+ units (3.45–3.56 Å) which assemble two anions and one cation to {[TcNCl4][Au(Et2dtc)2] · [TcNCl4]}– moieties.

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Binary compounds and oxide halides

Schwochau

2000

Technetium

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EPR Spectroscopy on Technetium Compounds

Cited by 18 publications

References 13 publications

Ammonium Pertechnetate in Mixtures of Trifluoromethanesulfonic Acid and Trifluoromethanesulfonic Anhydride

Ammonium Pertechnetate in Mixtures of Trifluoromethanesulfonic Acid and Trifluoromethanesulfonic Anhydride

[Au(Et2dtc)2][TcNCl4] - Darstellung und Struktur

Binary compounds and oxide halides

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