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

Le Gal, Julien and Tisato, Francesco and Bandoli, Giuliano and Gressier, Marie and Jaud, Joël and Michaud, Sandra and Dartiguenave, Michèle and Benoist, Eric Synthesis and structural characterization of new oxorhenium and oxotechnetium complexes with XN2S-tetradentate semi-rigid ligands(X = O, S, N). (2005) Dalton Transactions (n° 23). pp. 3800-3807. ISSN 1477-9226

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Official URL: http://dx.doi.org/10.1039/b508661b

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.

Item Type:Article
Additional Information:Thanks to Royal Society of Chemistry editor. The definitive version is available at http://www.rsc.org/ The original PDF of the article can be found at Dalton Transactions website : http://www.rsc.org/publishing/journals/DT/article.asp?doi=b508661b
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Università degli Studi di Padova (ITALY)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Other partners > Consiglio Nazionale delle Ricerche - CNR (ITALY)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
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French research institutions > Centre National de la Recherche Scientifique - CNRS
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Deposited By: Nihad Lahdifi
Deposited On:06 Jul 2010 07:30

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