Method for producing transition metal compounds and their use for the polymerization of olefins
申请人:——
公开号:US20030191334A1
公开(公告)日:2003-10-09
The invention relates to a method for producing special transition metal compounds, to novel transition metal compounds and to their use for the polymerization of olefins.
这项发明涉及一种生产特殊过渡金属化合物的方法,新型过渡金属化合物以及它们用于烯烃聚合的用途。
Carbon−Nitrogen-Bond-Forming Reductive Elimination of Arylamines from Palladium(II) Phosphine Complexes
作者:Michael S. Driver、John F. Hartwig
DOI:10.1021/ja971057x
日期:1997.9.1
and dimeric palladium amido complexes underwent C−N-bond-forming reductive elimination to form arylamines in high yields along with a Pd(0) species. Reductive elimination was also observed from azametallacycle (PPh3)Pd(η2-C6H4C6H4NH), to form carbazole and Pd(PPh3)4 at room temperature. Mechanistic studies on the reductive elimination reactions of the monomeric PPh3-ligated amido complexes indicated
temperature are easily alkylated in the presence of catalytic quantities of [2.2.2]cryptand, without affecting addition-elimination ratios. Thus, Williamson and Gabriel syntheses, as well as the alkylation of secondary amines, occur readily in mild conditions.
Ytterbium(II) amides and crown ethers: addition versus amide substitution
作者:Peter B. Hitchcock、Alexei V. Khvostov、Michael F. Lappert、Andrey V. Protchenko
DOI:10.1016/s0022-328x(01)01408-5
日期:2002.3
ligand. Crystalline 4 has a “threaded” structure with the NPh2 groups on the opposite sides of the [18]crown-6 ligand and the N−Yb−N′ angle of 176.6°. An X-ray diffraction study of the related potassium amide [K([18]crown-6)(NPh2)] (6) reveals that the K ion coordinates to one of the Ph-rings rather than to the amido nitrogen atom. There is significant delocalisation of negative charge in the amido ligand
Non-metallocene compounds, method for the production thereof and use of the same for the polymerisation of olefins
申请人:——
公开号:US20040023940A1
公开(公告)日:2004-02-05
The invention relates to a method for producing special transition metal compounds, to novel transition metal compounds and to the use of the same for the polymerisation of olefins.