Synthese, Struktur und Reaktivität von Tris-, Bis- und Mono(2,4-dimethylpentadienyl)-Komplexen des Neodyms, Lanthans und des Yttriums
作者： Michael R. Kunze , Dirk Steinborn , Kurt Merzweiler , Christoph Wagner , Joachim Sieler
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摘要: The tris(2,4-dimethylpentadienyl) complexes [Ln(η5-Me2C5H5)3] (Ln = Nd, La, Y) are obtained analytically pure by reaction of the tribromides LnBr3·nTHF with potassium compound K(Me2C5H5)(thf)n in THF good yields. structural characterization is carried out X-ray crystal structure analysis and NMR-spectroscopically. tris can be transformed into dimeric bis(2,4-dimethylpentadienyl) [Ln2(η5-Me2C5H5)4X2] (Ln, X: Cl, Br, I; Y, Br) trihalides solvates molar ratio 2:1 toluene. Structure bonding conditions determined for selected compounds NMR-spectroscopically general. dimer-monomer equilibrium existing solution was investigated dependence donor strength solvent could established also preparation corresponding monomer neutral ligand [Ln(η5-Me2C5H5)2X(L)] X, L: py; thf; thf). Finally possibilities mono(2,4-dimethylpentadienyl)lanthanoid(III)-dibromid shown hexameric lanthanum complex [La6(η5-Me2C5H5)6Br12(thf)4] proved analysis.
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