Brandl, Martin and Brunner, Henri and Cattey, Helene and Mugnier, Yves and Wachter, Joachim and Zabel, Manfred (2002) Synthesis, reactivity and structures of ruthenium carbonyl clusters with telluride and hydride ligands. JOURNAL OF ORGANOMETALLIC CHEMISTRY, 659 (1-2). pp. 22-28. ISSN 0022-328X
Full text not available from this repository.Abstract
The reaction of [Cp-2*Nb(Te2H)] (1) (Cp* = C5Me5) with [Ru-3(CO)(12)] in boiling toluene gave [Ru-3(mu(2)-H)(2)(CO)(9)(mu(3)-Te)] (2), [Ru-6(mu(3)-H)(CO)(15)(mu(3)-Te)(3)][Cp-2*Nb(CO)(2)] (3) and [Ru-5(mu(2)-H)(CO)(14)(mu(4)-Te)][Cp-2*Nb(CO)(2)] (4) along with already known [Ru-4(CO)(11)(mu(4)-Te)(2)] (5). Complexes 2-4 were analytically and spectroscopically characterized and X-ray diffraction analyses of 3 and 4 were carried out. The anion of 3 is built up of a triangular hexametallic core Of C-3, symmetry, in which the central Ru-3 triangle, being bridged by a mu(3)-H ligand, is composed of three corner-linked Ru3Te tetrahedra. The main structural feature of the anion of 4 is a Ru5Te octahedron. The cations in 3 and 4 are known niobocenedicarbonyl species. The reaction of 2 with bis(diphenylphosphino)methane (dppm) gave [Ru-3(mu(2)-H)(2)(CO)(7)(dPPM)(mu(3)-Te)] (6). Low temperature H-1-NMR spectroscopy and X-ray diffraction analysis show an unsymmetrical distribution of both hydride ligands over the triangular Ru-3 basis of the Ru3Te tetrahedron. The reaction of 5 with dppm gave [Ru-3(CO)(7)(dppm)(mu(3)-Te)(2)] (7) and known [Ru-4(CO)(9)(dppm)(mu(4)-Te)(2)] (8). The crystal structure of 7 reveals a square pyramidal arrangement of the Ru3Te, core. Electrochemical studies of 5 show this complex to be able to consume up to four electrons in reversible steps. (C) 2002 Elsevier Science B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | COORDINATION CHEMISTRY; METAL; ruthenium; tellurium; carbonyl ligands; cluster chemistry |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Alumni or Retired Professors > Arbeitskreis Dr. Joachim Wachter Chemistry and Pharmacy > Institut für Anorganische Chemie > Alumni or Retired Professors > Prof. Dr. Henri Brunner |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 27 Aug 2021 06:55 |
| Last Modified: | 27 Aug 2021 06:55 |
| URI: | https://pred.uni-regensburg.de/id/eprint/39840 |
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