One Ligand, One Metal, Seven Oxidation States: Stable Technetium Complexes with the "Kläui Ligand"

Anna C Grunwald; Clemens Scholtysik; Adelheid Hagenbach; Ulrich Abram

doi:10.1021/acs.inorgchem.0c01264

One Ligand, One Metal, Seven Oxidation States: Stable Technetium Complexes with the "Kläui Ligand"

Inorg Chem. 2020 Jul 6;59(13):9396-9405. doi: 10.1021/acs.inorgchem.0c01264. Epub 2020 Jun 23.

Authors

Anna C Grunwald¹, Clemens Scholtysik¹, Adelheid Hagenbach¹, Ulrich Abram¹

Affiliation

¹ Freie Universität Berlin, Institute of Chemistry and Biochemistry, Fabeckstraße 34/36, D-14195 Berlin, Germany.

PMID: 32573206
DOI: 10.1021/acs.inorgchem.0c01264

Abstract

A series of technetium complexes with (η⁵-cyclopentadienyl)tris(dimethyl phosphito-P)cobaltate(III), also known as the "Kläui ligand" {L^OMe}^-, has been prepared. The products span seven different oxidation states (+1 to +7) of the radioactive transition metal and comprise nitrosyl, halide, oxido and nitrido complexes. All members of this series ([Tc^I(NO)Cl(PPh₃)(L^OMe)], [Tc^II(NO)Cl₂(L^OMe)], [Tc^IIICl₂(PPh₃)(L^OMe)], [Tc^IVCl₃(L^OMe)], [Tc^VOCl₂(L^OMe)], [Tc^VNCl(PPh₃)(L^OMe)], [Tc^VINCl₂(L^OMe)], and [Tc^VIIO₃(L^OMe)] are air- and water-stable compounds, which recommends this class of technetium complexes as potential candidates for nuclear medical imaging procedures.