182229-58-9Relevant academic research and scientific papers
Organometallic compounds of the lanthanoids. 111. Synthesis and characterization of cationic metallocene complexes of the lanthanoides. X-ray crystal structure of [Cp2*Yb(THF)2][BPh4]
Schumann, Herbert,Winterfeld, J?rn,Keitsch, Markus R.,Herrmann, Katja,Demtschuk, J?rg
, p. 1457 - 1461 (2008/10/09)
Cationic organolanthanoide compounds [(C5H4R)2Sm(THF)2][BPh4] (R = 1Bu (1), SiMe3 (2)), [Pyr2*Sm(THF)][BPh4] (3) (Pyr* = NC4H21Bu2-2,5), [Cp2*Ln-(THF)2][BPh4] (Cp* = C5Me5; Ln = Y (4), Yb (5)), and [(C5Me4Et)2Ln(THF)2][BPh 4] (Ln = Y (6), Sm (7)) have been synthesized by oxidation of the divalent metallocenes [(C5H4R)2Sm(THF)2] (R = 1Bu, SiMe3), [Pyr2*Sm(THF)], [Cp2*Yb(THF)], and [(C5Me4Et)2Sm(THF)] with Ag[BPh4] and by protolysis of the lanthanoide alkyls [Cp2*YMe(THF)], [Cp2*YbCH(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) ?, β = 96.47(4)°, Z = 4 and V = 4383(3) ?3 (R = 0.0291 for 8517 observed reflections with Fo ≥ 4σ (Fo). Johann Ambrosius Barth 1996.
