Ti(N C t Bu 2)3 Cl(1)与TlPF 6在乙腈中反应,得到[Ti(N C t Bu 2)3(N⋮CCH 3)] PF 6(2),证明是不稳定的,并且在室温下以溶液或固态分解。尝试重结晶2从CH 2氯2导致钛[Ti /己烷混合物3(N c ^吨卜2)6(μ 2 -F)3(μ3 -F)2 ] [PF 6 ](3)。用LiMe和PhCH 2 MgCl处理1分别得到化合物Ti(N C t Bu 2)3 CH 2 Ph(4)和Ti(N C t Bu 2)3 Me(5)。4用B(C处理6 ˚F 5)3,得到钛[Ti(N c ^吨卜2)3(CH 2 PH)B(C 6 ˚F5)3 ](6),它存在于溶液为在两种物质的混合物,所述两性离子钛[Ti(N c ^吨卜2)3 ] [(μ-CH 2 PH)B(C 6 ˚F 5)3 ](6A)和溶剂化物阳离子[Ti(N C t Bu 2)3(溶剂)] [(CH
Titanium and zirconium ketimide complexes: synthesis and ethylene polymerisation catalysis
摘要:
The syntheses of ketimide titanium complexes of the type Ti(N=C'Bu-2)(3)X (X = Cl, CP, Ind), Ti(N=C'Bu-2)(4) and the zirconium complex CpZr(N=C'Bu-2)(2)Cl are described. When activated by MAO, all compounds are ethylene polymerisation catalysts. In the conditions studied, the most active catalyst is CpZr(N=C'Bu-2)(2)Cl, with an activity of 2.7 x 10(5) kg/(molZr [E] h). Titanium complexes are less active by about two orders of magnitude. The polyethylene produced is linear, as determined by NMR spectroscopy. Molecular structures of Ti(N=C'Bu-2)(3)X (X = Cl, Cp, Ind) and Ti(N=C'Bu-2)(4) were determined by X-ray single crystal diffraction. (C) 2004 Elsevier B.V. All rights reserved.
Titanium and zirconium ketimide complexes: synthesis and ethylene polymerisation catalysis
作者:Ana M. Martins、M. Mercês Marques、José R. Ascenso、Alberto R. Dias、M. Teresa Duarte、Anabela C. Fernandes、Susete Fernandes、M. João Ferreira、Inês Matos、M. Conceição Oliveira、Sandra S. Rodrigues、Claire Wilson
DOI:10.1016/j.jorganchem.2004.10.030
日期:2005.2
The syntheses of ketimide titanium complexes of the type Ti(N=C'Bu-2)(3)X (X = Cl, CP, Ind), Ti(N=C'Bu-2)(4) and the zirconium complex CpZr(N=C'Bu-2)(2)Cl are described. When activated by MAO, all compounds are ethylene polymerisation catalysts. In the conditions studied, the most active catalyst is CpZr(N=C'Bu-2)(2)Cl, with an activity of 2.7 x 10(5) kg/(molZr [E] h). Titanium complexes are less active by about two orders of magnitude. The polyethylene produced is linear, as determined by NMR spectroscopy. Molecular structures of Ti(N=C'Bu-2)(3)X (X = Cl, Cp, Ind) and Ti(N=C'Bu-2)(4) were determined by X-ray single crystal diffraction. (C) 2004 Elsevier B.V. All rights reserved.
Alkylation, Cation Formation, and Insertion Reactions in Titanium Tris(ketimide) Complexes
作者:M. João Ferreira、Inês Matos、José R. Ascenso、M. Teresa Duarte、M. Mercês Marques、Claire Wilson、Ana M. Martins
DOI:10.1021/om060554w
日期:2007.1.1
respectively. 4 was treated with B(C6F5)3 to afford [Ti(NCtBu2)3(CH2Ph)B(C6F5)3] (6), which exists in solution as a mixture of two species, the zwitterion [Ti(NCtBu2)3][(μ-CH2Ph)B(C6F5)3] (6A) and the solvate cation [Ti(NCtBu2)3(Solv)][(CH2Ph)B(C6F5)3] (6B). Above 60 °C, C6F5 is transferred to the metal center and Ti(NCtBu2)3(C6F5) (9) forms. This compound participates in a dynamic process in solution involving
Ti(N C t Bu 2)3 Cl(1)与TlPF 6在乙腈中反应,得到[Ti(N C t Bu 2)3(N⋮CCH 3)] PF 6(2),证明是不稳定的,并且在室温下以溶液或固态分解。尝试重结晶2从CH 2氯2导致钛[Ti /己烷混合物3(N c ^吨卜2)6(μ 2 -F)3(μ3 -F)2 ] [PF 6 ](3)。用LiMe和PhCH 2 MgCl处理1分别得到化合物Ti(N C t Bu 2)3 CH 2 Ph(4)和Ti(N C t Bu 2)3 Me(5)。4用B(C处理6 ˚F 5)3,得到钛[Ti(N c ^吨卜2)3(CH 2 PH)B(C 6 ˚F5)3 ](6),它存在于溶液为在两种物质的混合物,所述两性离子钛[Ti(N c ^吨卜2)3 ] [(μ-CH 2 PH)B(C 6 ˚F 5)3 ](6A)和溶剂化物阳离子[Ti(N C t Bu 2)3(溶剂)] [(CH