302912-04-5Relevant articles and documents
Synthesis and structural characterization of novel ytterbium(III) complexes with both a μ-oxo group and bridged indenyl ligands, and ytterbium(II) complexes with bridged indenyl ligands
Cheng, Lin,Feng, Yan,Wang, Shaowu,Luo, Wei,Yao, Wei,Yu, Zeyan,Xi, Xiaobing,Huang, Zixiang
, p. 1770 - 1777 (2007)
The reactivity of the ytterbium(III) amide [(Me3Si) 2N]3Yb(μ-Cl)Li(thf)3 with different bridged indene compounds in the presence of external donor ligands was studied. Reaction of [(Me3Si)2N]3Yb(μ-Cl)Li(thf)3 with the corresponding 1,2-bis-(indenyl)ethane [(CH2) 2(C9H7)2] or Me2Si(C 9H7)2, followed by the addition of excess thf, produced a novel tetranuclear ytterbium complex [(η5: η5-(CH2)2(C9H6) 2}Yb(μ-Cl)(μ3-O)Yb-(Cl)N(SiMe3) 2Li(thf)4]2 (1) or a novel dinuclear ytterbium complex [η5:η5-(CH3) 2Si(C9H6)2Yb]2(μ-Cl) (μ-O)Li(thf)2 (2), respectively. Treatment of [(Me 3Si)2N]3Yb(μ-Cl)Li(thf)3 with (CH2)2(C9H6SiMe3) 2 (3) or Me2Si(C9H7)2 under different conditions produced ytterbium(II) complexes [η5: η5-(CH2)2(C9H 5SiMe3)2]Yb(thf)2·(C 6H14)0.5 (4) and [η5: η5-(CH2)2(C9H 5SiMe3)2]Yb·dme (5) or [η5:η5-(CH3)2Si(C 9H6)2]Yb·tmeda (6), respectively. Interaction of the ytterbium(III) amide [η5:η5- (CH2)2(C9H6)2] YbN(SiMe3)2 with excess tmeda afforded the ytterbium(II) complex [η5:η5-(CH2)2(C 9H6)2]Yb·tmeda (7). All the compounds were fully characterized by spectroscopic methods and elemental analyses. Complexes 1, 2, and 4 were additionally characterized by single-crystal X-ray diffraction analyses. The solvents and temperature effects on the reaction are discussed. Wiley-VCH Verlag GmbH & Co. KGaA, 2007.
