One of the Me3Si-fluorenyl groups assumes η5-coordination, while the other Me3Si-fluorenyl group shows η6-coordination. The addition of excess THF to 5 produced (fluorenyl)Yb(THF)4/AlMe4 (6) in low yield. To understand the primary factor for the alternative η5- and η6-bonding modes, we have synthesized (iPr-indenyl)2Yb(THF)2 (7) without a Me3Si group and with a rather small indenyl ring and examined the
的可逆和平衡异构η 5 -双(ME 3的Si-
芴基) -善本类
金属配合物至η 6 -双(ME 3的Si-
芴为AlR 3) -善本类
金属配合物,这是一种新型metallotropic互变异构,是通过在以前的配合物中添加AlR 3来实现的。所得η 6 -complexes也改变为初始η 5个通过加入过量的THF -complexes可逆。η 5 -双(ME 3的Si-
芴基)
钐(THF)2(1)的制备是通过我的反应3的Si-fluorenylpotassium与SMI 2(THF)参照图2,通过X射线衍射分析其结构。η 6 -双(ME 3的Si-
芴阿尔梅3)SM(2)通过反应合成1用过量阿尔梅3。过量ALET的相应反应3与1,得到η 6 -双(ME 3的Si-
芴ALET 3)SM(3)。2和3的结构通过X射线分析确定。双(Me 3 Si-
芴基)Yb(THF)2(4)与过量的AlMe 3的反应得到η