Highly Active, Thermally Stable, Ethylene-Polymerisation Pre-Catalysts Based on Niobium/TantalumImine Systems
作者:Carl Redshaw、Mark Walton、Lucy Clowes、David L. Hughes、Anna-Marie Fuller、Yimin Chao、Alex Walton、Victor Sumerin、Pertti Elo、Igor Soshnikov、Weizhen Zhao、Wen-Hua Sun
DOI:10.1002/chem.201300453
日期:2013.7.1
bis(imino)pyridine ligand L4, 2,6‐[2,6‐iPr2C6H3N(Me)C]2C5H3N, afforded known complexes of the type [MCl3(L4)] (M=Nb, 4 a; Ta, 4 b), whereas the reaction of 2‐acetyl‐6‐iminopyridine ligand L5, 2‐[2,6‐iPr2C6H3N(Me)C]‐6‐Ac‐C5H3N, with the niobium precursor afforded the coupled product [(2‐Ac‐6‐(2,6‐iPr2C6H3N(Me)C)C5H3N}NbOCl2)2] (5). The reaction of MCl5 with Schiff‐base pro‐ligands L6H–L10H, 3,5‐(R
的MC1的反应5或代替MoCl 3与咪唑系亲配体L 1 H,3,5-吨卜2 -2-OH-C 6 H ^ 2(4,5--PH - 2 - 1H - )咪唑,或基于恶唑的配体L 2 H,3,5 t Bu 2 -2-OH-C 6 H 2(1H-菲[9,10- d ])恶唑,经过后处理,得到八面体复合物[MX(L 1,2)],其中MX = NbCl 4(L 1,1,L 2,2一),[NbOCl 2(NCMe)](L 1,图1b,L 2,图2b),TACL 4(L 1,1c中,L 2,2 C),或[TaOCl 2(NCMe)](L 1,1 d)。α二亚胺的配体治疗大号3,(2,6-我镨2 ç 6 ħ 3 NCH)2,用[的MC1 4(THF)2 ],得到(M =铌,钽)的MC1 4(L 3)](M = Nb,3 a ; Ta,3 b)。的反应〔的MC1 3(DME)](DME = 1,2-二甲氧基乙烷;