[Re6Q7O(3,5-Me2PzH)6]Br2·3,5-Me2PzH (Q = S, Se) – new octahedral rhenium cluster complexes with organic ligands: original synthetic approach and unexpected ligand exchange in the cluster core

[Re6Q7O(3,5-Me2PzH)6]Br2·3,5-Me2PzH (Q = S, Se) – new octahedral rhenium cluster complexes with organic ligands: original synthetic approach and unexpected ligand exchange in the cluster core Full article

Journal

European Journal of Inorganic Chemistry
ISSN: 1434-1948 , E-ISSN: 1099-0682

Output data

Year: 2005, Number: 4, Pages: 657-661 Pages count : 5 DOI: 10.1002/ejic.200400465

Authors

Mironov Yuri V. ¹ , Shestopalov Michael A. ¹ , Brylev Konstantin A. ¹ , Yarovoi Spartak S. ¹ , Romanenko Galina V. ¹ , Fedorov Vladimir E. ¹ , Spies Hartmut ² , Pietzsch Hans‐Juergen ² , Stephan Holger ² , Geipel Gerhard ³ , Bernhard Gert ³ , Kraus Werner ⁴

Affiliations

1	Nikolaev Institute of Inorganic Chemistry SB RAS
2	Institut für Bioanorganische und Radiopharmazeutische Chemie, Forschungszentrum Rossendorf,
3	Institut für Radiochemie, Forschungszentrum Rossendorf
4	Bundesanstalt für Materialforschung und Prüfung

Abstract Two new octahedral rhenium cluster complexes, [Re6S7O(3,5-Me2PzH)6]Br2·3,5-Me2PzH (1) and [Re6Se7O(3,5-Me2PzH)6]Br2·3,5-Me2PzH (2), with the organic ligand 3,5-dimethylpyrazole (3,5-Me2PzH), have been synthesised by reaction of rhenium chalcobromides Cs3[Re6(µ3-Q7Br)Br6] (Q = S, Se) with molten dimethylpyrazole. During the reaction, all six apical bromine ligands of the cluster complexes are substituted by the organic ligand, which is coordinated through the aromatic nitrogen atom N2. Additionally, the inner ligand µ3-Br in the cluster core [Re6(µ3-Q7Br)]3+ is substituted by oxygen, giving cluster cores [Re6(µ3-Q7O)]2+ with mixed chalcogen/oxygen ligands. Compounds 1 and 2 have been characterised by single-crystal X-ray diffraction analysis. They are isostructural and crystallise with four formula units in the unit cell. Absorption spectra and luminescence characteristics of these two cluster compounds have been investigated in methanol. Absorption starts below 400 nm. For both compounds, broad emissions were found. The fluorescence decays of the two compounds follow a diexponential decay behaviour. The main fluorescence intensity decays have longer fluorescence lifetimes of 3.07 ± 0.03 (1) and 3.96 ± 0.02 µs (2). Studying the thermal stability of both compounds in vacuo showed that the release of 3,5-dimethylpyrazole ligands begins near 200 °C, and decomposition, with the removal of 7 molecules of 3,5-Me2PzH, is complete at 330 °C.

Mironov Y. , Shestopalov M. , Brylev K. , Yarovoi S. , Romanenko G. , Fedorov V. , Spies H. , Pietzsch H. , Stephan H. , Geipel G. , Bernhard G. , Kraus W.
[Re6Q7O(3,5-Me2PzH)6]Br2·3,5-Me2PzH (Q = S, Se) – new octahedral rhenium cluster complexes with organic ligands: original synthetic approach and unexpected ligand exchange in the cluster core
European Journal of Inorganic Chemistry. 2005. N4. P.657-661. DOI: 10.1002/ejic.200400465 WOS Scopus РИНЦ OpenAlex

Submitted:	Jun 3, 2004
Published online:	Jan 7, 2005

Web of science:	WOS:000227257100005
Scopus:	2-s2.0-20044396537
Elibrary:	13491991
OpenAlex:	W2155155499

DB	Citing
Web of science	35
Scopus	39
Elibrary	37
OpenAlex	30