<i>C</i><sub>2</sub>-Symmetric <i>ansa</i>-Lanthanidocene Complexes. Synthesis via Silylamine Elimination and β-SiH Agostic Rigidity
作者:Jörg Eppinger、Michael Spiegler、Wolfgang Hieringer、Wolfgang A. Herrmann、Reiner Anwander
DOI:10.1021/ja992786a
日期:2000.4.1
mononuclear metallocene complexes of the lanthanide elements is described. Heteroleptic lanthanidocene silylamidecomplexes have been obtained ate-complex-free according to silylamine elimination reactions of complexes Ln[N(SiHMe2)2]3(THF)x (x = 1, Ln = Sc; x = 2, Ln = Y, La, Nd, Lu) and linked, substituted cyclopentadiene and indene systems. The molecular structure of [Me2Si(C5Me4)2]La[N(SiHMe2)2] (95% isolated
描述了一类新的镧系元素的 C2 对称单核茂金属配合物的合成以及光谱和结构表征。根据配合物 Ln[N(SiHMe2)2]3(THF)x (x = 1, Ln = Sc; x = 2, Ln = Y, La , Nd, Lu) 和连接的、取代的环戊二烯和茚系统。[Me2Si(C5Me4)2]La[N(SiHMe2)2](95% 分离产率)的分子结构已通过 X 射线晶体学确定。已经以高达 72% 的外消旋产率分离出 Brintzinger 型茚基衍生的茂金属配合物。IR 和多核 NMR 光谱(1H、13C、29Si、
Synthesis, structure, and ethene polymerisation catalysis of 1- or 2-silyl substituted bis[indenyl]zirconium(<scp>iv</scp>) dichlorides
作者:Andreas C. Möller、Richard H. Heyn、Richard Blom、Ole Swang、Carl Henrik Görbitz、Jürgen Kopf
DOI:10.1039/b400505h
日期:——
corresponding zirconocene dichlorides are presented. The rac- and meso-diastereomers of the 1-substituted zirconocene dichlorides can in most cases be separated. Instable zirconocenes were observed for certain substitution patterns. Two of the obtained zirconocene dichlorides, bis[2-(dimethylsilyl)indenyl]zirconiumdichloride (4a) and bis[2-(trimethylsilyl)indenyl]zirconiumdichloride (4b), were characterised
Fluxional Behavior of Indenyl-Derived Ytterbocene(II) Complexes. The SiHR<sub>2</sub> Group as a NMR Spectroscopic Probe
作者:Michael G. Klimpel、Wolfgang A. Herrmann、Reiner Anwander
DOI:10.1021/om000324w
日期:2000.11.1
Indenyl-derived ytterbocene(II) complexes [1-(SiHR2)-2-R‘-C9H5]2Yb(L)2 (R = Me, C6H5; R‘ = H, Me; L = donor ligand) have been synthesized via silylamine elimination from Yb[N(SiMe3)2]2(THF)2 and the indene derivatives in hexane at ambient temperature. The “SiH-decorated” silyl substituents assist in the examination of the fluxionalbehavior of the stereoisomers in solution, the ratio and interconversion
茚基衍生的杂茂(II)配合物[1-(SiHR 2)-2-R'-C 9 H 5 ] 2 Yb(L)2(R = Me,C 6 H 5 ; R'= H,Me; L通过在室温下从Yb [N(SiMe 3)2 ] 2(THF)2和茚衍生物在己烷中的甲硅烷基胺消除反应合成=(供体配体)。“装饰有SiH”的甲硅烷基取代基有助于检查溶液中立体异构体的流动行为,其比例和相互转化受取代基的大小和环位置以及供体配体的类型影响,例如, THF vs TMEDA。