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  Uncharged Selenium Rings as Terminal and Bridging Ligands in Selenium-Rich Iridium Clusters

Stolze, K., & Ruck, M. (2014). Uncharged Selenium Rings as Terminal and Bridging Ligands in Selenium-Rich Iridium Clusters. Zeitschrift für anorganische und allgemeine Chemie, 640(8-9), 1559-1563. doi:10.1002/zaac.201400092.

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 Urheber:
Stolze, Karoline1, Autor
Ruck, Michael2, Autor           
Affiliations:
1external, ou_persistent22              
2Michael Ruck, Max Planck Fellow, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863444              

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 Zusammenfassung: Purple air-stable crystals of Ir8Se40Br10 were obtained by reacting Ir in an excess of Se and SeBr4 at 300 degrees C for two weeks. The monoclinic crystal structure [space group P2(1)/c, a = 1371.9(1) pm, b = 1108.1(1) pm, c = 2058.2(1) pm, beta = 106.897(2)degrees at 296(1) K] consists of uncharged clusters Ir8Se40Br10 = (Ir3+)(8)(Se-2(2-))(Se-4(2-))(6)(Se-7)(2)(Br-)(10). The iridium(III) cations are coordinated octahedrally by selenium and bromide ions. While the oligoselenide anions provide high intra-cluster connectivity, mu(6)-eta(2) in the case of Se-2(2-) and mu(4)-eta(3) for Se-4(2-), the terminal uncharged Se-7 rings have boat conformation and are eta(1)-coordinating. About 10% of the Se-7 rings are substituted by Se-6 rings with chair conformation. A similar reaction using SeCl4 yielded vermillion air-stable crystals of Ir2Se9Cl6. X-ray diffraction on a single-crystal revealed a tetragonal lattice (space group I4(1)/a) with a = 1229.8(1) pm and c = 2365.5(2) pm at 296(1) K. In the Se-9(IrCl3)(2) cluster, a crown-shaped uncharged Se-9 ring coordinates two iridium(III) cations as a bridging bis-tridentate ligand. Three terminal chloride ions complete the distorted octahedral coordination of each transition metal atom.

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 Datum: 2014-07-01
 Publikationsstatus: Erschienen
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 Identifikatoren: ISI: 000339561500004
DOI: 10.1002/zaac.201400092
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Titel: Zeitschrift für anorganische und allgemeine Chemie
  Andere : Zeitschrift fuer Anorganische und Allgemeine Chemie
  Andere : Journal of Inorganic and General Chemistry
  Andere : J. Inorg. Gen Chem.
  Kurztitel : Z. Anorg. Allg. Chem.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Weinheim : WILEY-VCH Verlag GmbH & Co. KGaA
Seiten: - Band / Heft: 640 (8-9) Artikelnummer: - Start- / Endseite: 1559 - 1563 Identifikator: ISSN: 0044-2313
CoNE: https://pure.mpg.de/cone/journals/resource/954925453895