Synthesis and structural characterization of new oxorhenium and oxotechnetium complexes with XN2S-tetradentate semi-rigid ligands(X = O, S, N) - Archive ouverte HAL Access content directly
Journal Articles Dalton Transactions Year : 2005

Synthesis and structural characterization of new oxorhenium and oxotechnetium complexes with XN2S-tetradentate semi-rigid ligands(X = O, S, N)

Julien Le Gal
  • Function : Author
Francesco Tisato
  • Function : Author
Giuliano Bandoli
  • Function : Author
Marie Gressier
Sandra Michaud
  • Function : Author
Michèle Dartiguenave
  • Function : Author
Eric Benoist

Abstract

Twelve novel oxo-technetium and oxo-rhenium complexes based on N2S2-, N2SO- or N3S-tetradentate semi-rigid ligands have been synthesised and studied herein. By reacting the ligands with a slight excess of suitable [MO]3+ precursor (ReOCl3(PPh3)2 or [NBu4][99gTcOCl4]), the monoanionic complexes of general formula [MO(Ph–XN2S)]− could be easily produced in high yield. The complexes have been characterized by means of IR, electrospray mass spectrometry, elemental analysis, NMR and conductimetry. The crystal structures of [PPh4][ReO(Ph–ON2S)] 1b and [NBu4][99gTcO(Ph–ON2S)] 1c have been established. The [MO]3+ moiety was coordinated via the two deprotonated amide nitrogens, the oxygen and the terminal sulfur atoms in 1b and 1c. In both compounds, the ON2S coordination set is in the equatorial plane, and the complexes adopted a distorted square-pyramidal geometry with an axial oxo-group. The chemical and structural identity of the different prototypic complexes (rhenium, 99gTc complexes and their corresponding 99mTc radiocomplexes) have been also established by a comparative HPLC study.

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Materials
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Dates and versions

hal-03600003 , version 1 (07-03-2022)

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Julien Le Gal, Francesco Tisato, Giuliano Bandoli, Marie Gressier, Joël Jaud, et al.. Synthesis and structural characterization of new oxorhenium and oxotechnetium complexes with XN2S-tetradentate semi-rigid ligands(X = O, S, N). Dalton Transactions, 2005, 23, pp.3800-3807. ⟨10.1039/b508661b⟩. ⟨hal-03600003⟩
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