Iminoacetylacetonat-Komplexe der Lanthanoide: Synthese, Eigenschaften und Struktur / Iminoacetylacetonate Complexes of Lanthanides: Synthesis, Properties and Structure (original) (raw)

1993, Zeitschrift für Naturforschung B

The reactions of (η5-C5Me5)2Ln(μ-Cl)2ML2 (Ln = Y, La, Lu; M = Li, K; L = Et2O, dme) 3a-c with the sodium iminoacetylacetonates 2a-b yield monomeric metallocene chelate complexes , (Ln = Y, La, Lu; R = C6H5, C6H4-4-Me) 4a-d which have been characterized by IR, NMR and mass spectrometry. In the case of the lanthanum complex 4c, the chelating structure was confirmed by an X-ray structure analysis. 4c crystallizes monoclinically in space group P21/c with a = 10.232(3), b = 10.216(1), c = 29.047(7)Å, α = γ = 90.0°, β = 97.76(3)°, Ζ = 4, and R = Rw = 0.0378 for 4026 observed reflections. The new complexes are sensitive to oxygen and moisture and soluble in all common organic solvents.