Metallorganische Verbindungen der Lanthanoide. 111. Synthese und Charakterisierung kationischer Metallocen-Komplexe der Lanthanoide. Röntgenstrukturanalyse von [CpYb(THF)2][BPh4] |
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Authors: | Herbert Schumann Jrn Winterfeld Markus R Keitsch Katja Herrmann Jrg Demtschuk |
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Institution: | Herbert Schumann,Jörn Winterfeld,Markus R. Keitsch,Katja Herrmann,Jörg Demtschuk |
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Abstract: | Organometallic Compounds of the Lanthanoids. 111. Synthesis and Characterization of Cationic Metallocene Complexes of the Lanthanoides. X-Ray Crystal Structure of Cp Yb(THF)2]BPh4] Cationic organolanthanoide compounds (C5H4R)2Sm(THF)2]BPh4] (R = tBu ( 1 ), SiMe3 ( 2 )), PyrSm(THF)]BPh4] ( 3 ) (Pyr* = NC4H2tBu2-2,5), CpLn(THF)2]BPh4] (Cp* = C5Me5; Ln = Y ( 4 ), Yb ( 5 )), and (C5Me4Et)2 Ln(THF)2]BPh4] (Ln = Y ( 6 ), Sm ( 7 )) have been synthesized by oxidation of the divalent metallocenes (C5H4R)2Sm(THF)2] (R = tBu, SiMe3), PyrSm(THF)], CpYb(THF), and (C5Me4Et)2Sm(THF)] with AgBPh4] and by protolysis of the lanthanoide alkyls CpYMe(THF)], CpYbCH(SiMe3)2], and (C5Me4Et)2LnCH(SiMe3)2] (Ln = Y, Sm) by NEt3H]BPh4]. The 1H- and 13C-NMR spectra of the new compounds are discussed. 5 crystallizes in the space group P21/c with a = 10.604(7), b = 21.749(3), c = 19.124(4) Å, β = 96.47(4)°, Z = 4 and V = 4383(3) Å3 (R = 0.0291 for 8517 observed reflections with Fo ≥ 4σ (Fo). |
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Keywords: | Cationic Organolanthanoides Lanthanoide(III) Tetraphenylborates Yttrium Samarium Ytterbium |
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