[EN] METHODS OF MAKING ALKYLATED METALLOCENES HAVING ONE OR MORE TETRAHYDROPENTALENYL GROUPS [FR] PROCÉDÉS DE FABRICATION DE MÉTALLOCÈNES ALKYLÉS AYANT UN OU PLUSIEURS GROUPES TÉTRAHYDROPENTALÉNYLE
[EN] METHOD FOR SYNTHESIS OF MONOCYCLOPENTADIENYL COMPLEXES OF ZIRCONIUM AND HAFNIUM<br/>[FR] PROCÉDÉ POUR LA SYNTHÈSE DE COMPLEXES DE MONOCYCLOPENTADIÉNYLE DE ZIRCONIUM ET D'HAFNIUM
申请人:UNIVATION TECH LLC
公开号:WO2016168448A1
公开(公告)日:2016-10-20
Catalyst systems and methods for making and using the same are disclosed. In an example, a method of synthesizing a monocyclopentadienyl compound is provided. The method includes melting a dicyclopentadienyl compound including the following structure: (A). As used herein, M is hafnium or zirconium. Each R is independently an H, a hydrocarbyl group, a substituted hydrocarbyl group, a heteroatom group. Each X is a leaving group selected from a halogen or a heteroatom group. A reaction melt is formed by adding a metal salt including the following structure: (B). A monocyclopentadienyl compound is deposited from a vapor formed over the reaction melt, wherein the monocyclopentadienyl compound includes the following structure: (C).
[EN] A HAFNIUM COMPLEX; A SUPPORTED HAFNIUM COMPLEX; METHODS OF FORMING A POLYMER USING SUCH COMPLEXES<br/>[FR] COMPLEXE D'HAFNIUM, COMPLEXE D'HAFNIUM SUPPORTÉ, PROCÉDÉS DE FORMATION D'UN POLYMÈRE À L'AIDE DE TELS COMPLEXES
申请人:UNIVATION TECH LLC
公开号:WO2018213395A1
公开(公告)日:2018-11-22
Embodiments of the present disclosure are directed towards metal complexes that can be utilized to form polymers. As an example, the present disclosure provides a metal complex of Formula I: wherein each Me represents methyl.
Mass Spectrometric Mechanistic Investigation of Ligand Modification in Hafnocene-Catalyzed Olefin Polymerization
作者:Anthony P. Gies、Roger L. Kuhlman、Cristiano Zuccaccia、Alceo Macchioni、Richard J. Keaton
DOI:10.1021/acs.organomet.7b00293
日期:2017.9.25
recently reported evidence that a cyclometalated intermediate can facilitate the polymerization of 1-hexene to append polymer chains to the termini of propyl groups of the Me2Hf(Cpn-Propyl)2 catalyst precursor. Herein we provide further mechanistic details on the activation of Me2Hf(Cpn-Propyl)2 by B(C6F5)3 and the polymerization of 1-hexene mainly by applying a battery of mass spectrometry-based techniques
我们最近报道的证据表明,环金属化的中间体可以促进1-己烯的聚合,以将聚合物链附加到Me 2 Hf(Cp n -Propyl)2催化剂前体的丙基末端。本文中,我们提供了有关B(C 6 F 5)3活化Me 2 Hf(Cp n -Propyl)2的更多机理的详细信息。1-己烯的聚合主要通过应用基于质谱技术的电池进行。首先,结合使用MALDI和CID断裂来表征分离的带有茂金属的聚(1-己烯)材料的高分子量区域(最高6 kDa)。CID片段化的模式可以通过较低的能量配体损失和通过CC键断裂和1,3-氢转移反应引起的较高能量的烃链降解来解释。通过研究使用已被B(C 6 F 5)3活化的13 C标记的适当催化剂的1-己烯聚合反应,可以获得更多的机理信息。。质谱分析以及支持的NMR实验表明,丙基环戊二烯基配体的聚合物链增长是通过metal金属环的一系列2,1-插入环扩展进行的。相反,通过常规的1,2-插入
Embodiments of the present disclosure are directed towards asymmetrical hafnium metallocenes, compositions including those asymmetrical hafnium metallocenes, and methods utilizing compositions including the asymmetrical hafnium metallocenes.
[EN] METHODS OF MAKING ALKYLATED METALLOCENES HAVING ONE OR MORE TETRAHYDROPENTALENYL GROUPS<br/>[FR] PROCÉDÉS DE FABRICATION DE MÉTALLOCÈNES ALKYLÉS AYANT UN OU PLUSIEURS GROUPES TÉTRAHYDROPENTALÉNYLE
申请人:DOW GLOBAL TECHNOLOGIES LLC
公开号:WO2022256363A1
公开(公告)日:2022-12-08
Embodiments of the present disclosure are directed towards methods of making an alkylated metallocene having one or more tetrahydropentalenyl groups, the method comprising: reacting a chloride compound with a lithium compound to make a reaction mixture comprising an intermediate dichloride compound; and reacting the intermediate dichloride compound with an alkylating agent to make the alkylated metallocene having one or more tetrahydropentalenyl groups, wherein the dichloride compound is not isolated from the reaction mixture, wherein the lithium compound is represented by: wherein R1, R2, R3, R4, and R5are each independently H or a (C1-C4) alkyl.