[EN] PREPARATION OF PARTIALLY HYDROGENATED RAC-ANSA-METALLOCENE COMPLEXES [FR] PREPARATION DE COMPLEXES DE RAC-ANSA-METALLOCENES PARTIELLEMENT HYDROGENES
[Cp*RuOMe]2 (1) reacts with phenols by successive exchange of one and two OMe groups for the phenolato group, forming mixed μ-methoxy−μ-phenolato complexes (5) and bis(μ-phenolato) dimeric complexes (6) successively. The latter, by an intramolecular rearrangement, convert into Cp*Ru(η5-oxocyclohexadienyl) complexes (7). With phenol and 2-methyl-5-isopropylphenol (carvacrol) the stepwise reactions were
A novel C-S bond formation reaction took place, when a lithium phenolate derivative was treated with a disulfide-bridged dicopper(I) complex or a bis(micro-thiolato)dicopper(II) complex under very mild conditions. The reaction has been suggested to proceed via a disulfide-bridged (micro-phenoxo)dicopper(I) complex as the common reaction intermediate. Copper(II) complexes of the modified ligands containing
Synthesis of Imidazolin-2-iminato Titanium Complexes Containing Aryloxo Ligands and Their Catalytic Performance in the Polymerization of α-Olefins
作者:Dana Shoken、Linda J. W. Shimon、Matthias Tamm、Moris S. Eisen
DOI:10.1021/acs.organomet.6b00117
日期:2016.4.25
The synthesis of mixed (aryloxo)(imidazolin-2-inainato)-titanium dichloride complexes is presented. Full characterization of the complexes, including solid-state X-ray diffraction analysis of four complexes, is reported. Their catalytic activity in the polymerization of ethylene, propylene, 1-hexene, and 1-octene was studied. The different substituents at the aryloxo moiety were found to have a substantial impact on the reactivity of the complexes, indicating the need for a balance of steric and electronic effects. The complex (1,3-di-tert-butylimidazolin-2-iminato)(2,6-di-tert-butyl-4-methylphenoxide)-titanium dichloride (1) was found to be the most active in the polymerization of ethylene, whereas the complex (1,3-di-tert-butylimidazolin-2-iminato)(2,6-di-tert-butylphenoxide)titanium dichloride (2) was found to be the most active in the polymerization of propylene. Interestingly, all complexes were more active in the polymerization of propylene than in that of ethylene.
US6429273B1
申请人:——
公开号:US6429273B1
公开(公告)日:2002-08-06
[EN] PREPARATION OF PARTIALLY HYDROGENATED RAC-ANSA-METALLOCENE COMPLEXES<br/>[FR] PREPARATION DE COMPLEXES DE RAC-ANSA-METALLOCENES PARTIELLEMENT HYDROGENES
申请人:BASELL POLYOLEFINE GMBH
公开号:WO2004037838A1
公开(公告)日:2004-05-06
The invention relates to a process for preparing hydrogenated or partially hydrogenated, racemic ansa-metallocene complexes by reacting bridged or unbridged transition metal complexes with alkali metal compounds or alkaline earth metal compounds, heating the resulting reaction mixture to a temperature in the range from -78 to 250°C and at least partially hydrogenating the reaction products in the presence of a suitable catalyst, to the corresponding hydrogenated or partially hydrogenated metallocenes and to their use as catalysts or as a constituent of catalysts for the polymerization of olefinically unsaturated compounds or as reagents or catalysts in stereoselective synthesis.