Mehrfachbindungen zwischen Hauptgruppenelementen und Übergangsmetallen: XCIX. Synthese, Struktur und Eigenschaften von Bis(pentafluorphenyl)dioxobis(pyridin)osmium(VI), (C 6F 5) 2OsO 2·(py) 2

Abstract

The reaction of the glycolate complex O 2 Os(OCH 2CH 2O )·(py) 2 ( 1) with (C 6F 5) 2Zn·(py) 2 ( 2) afforded the first perfluorophenyl compound of osmium. The octahedral geometry of the title compound (η 1-C 6F 5) 2OsO 2·(py) 2 ( 3), containing a linear osmyl group {OsO 2} 2+, was determined by single crystal X-ray diffraction methods. The strikingly high stability of the bis(pyridine) complex, which sublimes at 230°C without decomposition, is due to the presence of the strongly electron withdrawing, σ-bonded perfluorophenyl groups.