Coordination compounds of titanium (IV) and 2-hydroxymethyl-phenol derivatives: Their synthesis, structure and catalytic activity in ethylene and 1-hexene polymerization
作者:Vladislav A. Tuskaev、Svetlana Ch Gagieva、Michail V. Solov'ev、Dmitrii A. Kurmaev、Nikolay A. Kolosov、Ivan V. Fedyanin、Boris M. Bulychev
DOI:10.1016/j.jorganchem.2015.08.017
日期:2015.11
A series of titanium complexes LTiCl2·(iPrOH)2 12-18 and heterobimetallic complex L2Ti·iPrOLi·THF 19 bearing saligenin-type [O,O]2- ligands 6-11 were synthesized in high yields from Cl2Ti(OiPr)2 or LiTi(OiPr)5. X-ray structure analyses for 15 and 19 revealed that these complexes adopt a distorted octahedron or distorted tetragonal pyramid geometry. When activated by binary activator 3Et2AlCl + Bu2Mg}
从Cl 2高收率合成了一系列含ali皂素型[O,O] 2配体6-11的钛配合物LTiCl 2 ·(i PrOH)2 12-18和异双金属配合物L 2 Ti· i PrOLi·THF 19。 Ti(O i Pr)2或LiTi(O i Pr)5。对15和19的X射线结构分析表明,这些络合物采用扭曲的八面体或扭曲的四角锥几何形状。当由二元活化剂3Et 2 AlCl + Bu 2活化时Mg 1,配合物12-19对乙烯和1-己烯聚合表现出中等至高的活性,得到具有宽分子量分布的高分子量聚合物。这项研究的结果表明,氯化锂和氯化镁具有独特的能力来提高后茂金属前催化剂的催化能力。
Chloride- and alkoxo-titanium(IV) complexes stabilized by 2-hydroxymethylphenol derivative as catalysts for the formation of ultra-high molecular weight polyethylene nascent reactor powders
作者:Svetlana Ch. Gagieva、Vladislav A. Tuskaev、Ivan V. Fedyanin、Alexander I. Sizov、Elena S. Mikhaylik、Evgenii K. Golubev、Boris M. Bulychev
DOI:10.1016/j.poly.2016.11.007
日期:2017.1
Abstract A series of titanium(IV) complexes (2–6) stabilized by a substituted 2-hydroxymethylphenole (1) – were synthesized and characterized by NMR- and IR-spectroscopy. Structures of complexes 5–6 were established by X-ray diffraction. Titanium atom in the dimeric complex 5 has an octahedral environment created by chlorine atoms and five oxygen atoms. In the tetrameric complex 6 coordination polyhedra
摘要合成了一系列由取代的2-羟甲基苯酚(1)稳定的钛(IV)配合物(2–6),并通过NMR和IR光谱进行了表征。配合物5–6的结构是通过X射线衍射确定的。二聚配合物5中的钛原子具有由氯原子和五个氧原子形成的八面体环境。在四聚体中,Ti(1)原子的配位多面体为三角形双锥体,在Ti(2)–四角锥中为五个氧原子。每种络合物均含有烷氧基和/或氯原子,在用镁或有机铝化合物处理期间容易留下。在3Et2AlCl + Bu2Mg}二元助催化剂存在下,所有所得络合物在乙烯聚合中均具有中等或高活性。配合物5和6在热稳定性和催化活性方面明显优于先前描述的类似物2-4。所得的聚合物是具有宽和宽分子量分布的高和超高分子量(超过2.5·105 g / mol)的线性聚乙烯。聚合物适用于现代的聚合物加工方法-超高强度(超过1.5 GPa的断裂强度)和高模量(超过60 GPa的弹性模量)的薄膜和薄膜带的无溶剂固态形成。
Steric effects of ortho substituents in reactions of phenols and phenolates with polyfluoroketones
作者:V. I. Dyachenko、M. V. Galakhov、A. F. Kolomiets、A. V. Fokin
DOI:10.1007/bf00953301
日期:1989.4
Oligomerization of higher olefins on titanium(+4) and vanadium(+5) coordination compounds with 2-hydroxymethylphenol derivatives
作者:S. Ch. Gagieva、N. A. Kolosov、D. A. Kurmaev、I. V. Fedyanin、V. A. Tuskaev、B. M. Bulychev
DOI:10.1007/s11172-014-0810-5
日期:2014.12
Polymers of propylene and higher 1-alkenes produced with post-metallocene complexes containing a saligenin-type ligand
作者:Laura A. Rishina、Svetlana S. Lalayan、Svetlana C. Gagieva、Vladislav A. Tuskaev、Evgeniya O. Perepelitsyna、Yury V. Kissin
DOI:10.1016/j.polymer.2013.09.052
日期:2013.11
Polymerization reactions of propylene and three higher linear 1-alkenes, 1-hexene, 1-octene and 1-decene, were carried out with post-metallocene catalysts derived from Ti complexes I and II with a bidentate phenol-alcohol (saligenin-type) ligand derived from 2,4-di-tert-buty1-6-(1,1,1,3,3,3-hexafluoro-2-hydroxy-propan-2-yl)phenol, in the presence of two cocatalysts, MAO and a combination of AlEt2Cl and MgBu2. All catalyst systems contain a large variety of active centers and produce both amorphous atactic polymers and partially crystalline isotactic material. The AlEt2Cl-MgBu2 cocatalyst produces significantly more active catalyst systems. Analysis of C-13 NMR data for the propylene polymers shows that the mechanism of isotactic chain growth is principally different for the active centers formed in the presence of the two cocatalysts. (C) 2013 Elsevier Ltd. All rights reserved.