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- W2015388975 abstract "The thermal reaction of Os3(CO)12 with S(NSiMe3)2 yields the cluster compound Os3(CO)9(μ3-S(μ3-NSiMe3. The structure of the molecule was solved by a single crystal X-ray structure analysis. In the solid state the osmium atoms define an “open” isosceles triangle which is bridged by both a sulphur and a trimethylslylnitrene ligand. The distance between the osmium atoms at the long edge of the triangle (3.498(2) Å compared to 2.774(2) and 2.777(2) Å for the short edges) suggests that these two Os atoms are not in bonding contract. A variable-temperature 13C NMR study reveals the structure of the molecule to be dynamic in solution; the spectra are indicative of the existence of two different structures at elevated temperatures. We interprete our findings as reconcilable with the assumption that a reversible closing and opening process of the Os-Os bonds can occur in solution. Durch thermische Reaktion von Os3(CO)12 mit S(NSiMe3)2 wird die Cluster- Verbindung Os3(CO)9(μ3-S)(μ3-NSiMe3) erhalten, deren Struktur durch eine Einkristall-Röntgenstrukturanalyse gelöst wurde. Im festen Zustand bilden die Osmium-Atome ein offenes gleichschenkliges Dreieck, das durch je ein Schwefelatom und einen Trimethylsilylnitren-Liganden überbrückt wird. Der Abstand zwischen den Osmium-Atomen auf der langen Seite des Dreiecks (3.498(2) Å, verglichen mit 2.774(2) und 2.777(2) Å für die kurzen Kanten) deutet an, dass diese beiden Osmium-Atome nicht aneinander gebunden sind. Durch 13C-NMR Untersuchugen bei verschiedenen Temperaturen wird gezeigt, dass die Struktur des Moleküls in Lösung dynamisch ist; die Spektren belegen die Existenz zweier verschiedener Strukturen bei erhöhter Temperatur. Unsere Befunde sind vereinbar mit der Annahme, dass in Lösung die OsOs-bindung reversibek geöffnet bzw.eschlossen weden kann." @default.
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- W2015388975 title "Hinweise auf reversibles öffnen und schliessen einer metallmetall-bindung in dem trimethylsilylnitren-sulfido-cluster Os3(CO)9(μ3-S)(μ-3NSiMe3)" @default.
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- W2015388975 doi "https://doi.org/10.1016/s0022-328x(00)82567-x" @default.
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