Abstract
[OsCl4(CH3CN)2] · 1/2CH3CN has been prepared by the reaction of OsCl5 with acetonitrile in a slow reaction at room temperature, forming red, moisture sensitive crystals. The compound was characterized by IR spectroscopy as well as by an X-ray structure determination. Space group Pnma, Z = 4, 1281 observed unique reflexions, R = 0.031. Lattice dimensions at 20 °C: a = 1032.5(5), b = 1356.0(7), c = 975.9(5) pm. The complex has a molecular structure, in which the osmium atom is octahedrally coordinated by four chlorine atoms and by two N-atoms of the ciscoordinated acetonitrile molecules. The included CH3CN molecules are disordered in two positions.
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