Zeitschrift für Naturforschung B · 1984 · 17 citations · 0 references
Natural SciencesChemistryCrystal StructureInorganic ChemistryOrganic ChemistryCoordination ChemistryCrystal ChemistryMagnetism Of Inorganic CompoundsMetal-ligand BondingTransition Metal ChemistryTransition Metal ComplexesCoordination Geometry DeterminationCrystal Structure DeterminationDiamagnetic ComplexesMagnetic Properties Of Coordination ComplexesMagnetic Properties Of Transition Metal ComplexesTetrahedral ComplexesTetrahedral CoordinationX-ray Structure Determination
Mononuclear cobalt(0) complexes containing diolefin and trimethylphosphane ligands Co(cycloocta-1,5-diene)(PMe 3 ) 2 and Co[(CH 2 =CHMe 2 Si) 2 O](PMe 3 ) 2 are obtained from CoCl 2 by reaction with magnesium in the presence of the ligands or by substitution of cobalt(olefin)tris- (trimethylphosphane) with diolefin. Chemical and spectroscopic properties confirm the para- magnetic valence state of the compounds in solution. An X-Ray crystal structure determination of Co[(CH 2 =CHMe 2 Si) 2 O](PMe 3 ) 2 shows a tetrahedral arrangement of ligand functions around the cobalt atom. With butadiene a diamagnetic dinuclear complex [Co(C 4 H 6 )(PMe 3 ) 3 ] 2 is obtained containing π-allyl co-ordination of two Co(PMe 3 ) 3 units to a linear dimer of butadiene