Mehrfachbindungen zwischen Hauptgruppenelementen und Übergangsmetallen. CI. Stereoselektive synthese gemischtalkylierter osmiumoxide

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

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Two-step alkylation of osmium(VI) glycolate complexes yields mixed-alkyl oxoosmium complexes of formula (R1)2(R2)2OsO along two different routes. Due to the chelate ligands present in the starting compounds, square-pyramidal alkyl complexes of cis-geometry (R1/R1 and R2/R2 respectively) are obtained in stereoselective reactions. The crystal and molecular structure of dimethyl(2,3-dimethylbutane-2,3-diolato)oxoosmium(VI) (4a) has been determined by X-ray diffraction, again revealing a square-pyramidal core geometry with the oxo ligand at the apex position [d(OsO) = 162.1(4) pm].

Original languageGerman
Pages (from-to)187-197
Number of pages11
JournalJournal of Organometallic Chemistry
Issue number1-2
StatePublished - Apr 28 1992

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