Mehrfachbindungen zwischen Hauptgruppenelementen und Übergangsmetallen. XCIV. Pyridin-Komplexe organischer Osmiumoxide: Synthese, Spektren und Kristallstrukturen der Stoffklassen R2OsO2·(L) und R2OsO2·(L)2

Wolfgang A. Herrmann, Stefan J. Eder, Paul Kiprof

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Alkylosmium(VI) complexes of compositions R2OsO2·(L) and R2OsO2·(L)2 are accessible from glycolate osmium(VI) complexes (R = CH3, CH2Si(CH3)3; L = pyridine). The equilibrium R2OsO2·(L)2 ⇌ R2OsO2·(L)+L is adjustable by vacuum (right) and pyridine (left). The dimethyl complex (CH3)2OsO2·C5H5N, albeit monomeric in solution, has a trinuclear structure (Os3O3 core geometry) in the crystal, while the formally analogous derivative [(CH3)3SiCH2]2OsO2·C5H5N is monomeric, displaying a strongly distorted trigonal-bipyramidal geometry (O-Os-O′ angle 141.3(4)°/141.7(4)°). All four complexes R2OsO2·(C5H5N)2 (R = CH3, 3a; CH2Si(CH3)3, 3b and R2OsO2·(C5H5N) (R = CH3, 4a; CH2Si(CH3)3, 4b) were characterized by means of single-crystal X-ray diffraction techniques.

Original languageGerman
Pages (from-to)27-41
Number of pages15
JournalJournal of Organometallic Chemistry
Issue number1-3
StatePublished - Aug 7 1991

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