Synthesis and Characterization of Novel Half-Metallocene-Type Group IV Complexes Containing Phosphine Oxide–Phenolate Chelating Ligands and Their Application to Ethylene Polymerization
作者:Jing-Yu Liu、San-Rong Liu、Bai-Xiang Li、Yan-Guo Li、Yue-Sheng Li
DOI:10.1021/om200317x
日期:2011.8.8
A series of novel half-metallocene-type group IV metal complexes containing phosphine oxide–phenolate chelating ligands of type CpMCl2[O-2R1-4R2-6(Ph2P═O)C6H2] (Cp = C5H5, M = Ti, 2a: R1 = R2 = H; 2b: R1 = Ph, R2 = H; 2c: R1 = tBu, R2 = H; 2d: R1 = R2 = tBu; M = Zr, 3b: R1 = Ph, R2 = H; 3c: R1 = tBu, R2 = H; 3d, R1 = R2 = tBu) have been synthesized in high yields (60–76%) from CpMCl3 (M = Ti, Zr) with
一系列含膦氧化物酚螯合型的配位体CpMCl新颖的半金属茂型IV族金属配合物的2 [O-2R 1 -4R 2 -6(PH 2 P = O)C 6 H ^ 2 ](CP = C 5 H 5,M = Ti,2a:R 1= R 2= H;2b:R 1= Ph,R 2= H;2c:R 1=t Bu,R 2= H;2d:R 1= R 2 = t Bu; M = Zr,3b:R 1= Ph,R 2= H;3c:R 1=t Bu,R 2= H;3D,R 1 = R 2 =吨丁基)已经以高产率(60-76%)从CpMCl被合成3(M =钛,锆)与1.0当量的2R 1 -4R 2 -6(PH 2 P = O C 6 H 2 OH在四氢呋喃中和三乙胺存在下,通过NMR和质谱以及元素分析鉴定配合物。结构为2A - d和3DX射线晶体学进一步证实了这一点。配合物2a – d在钛中心周围采用五坐标,扭曲的方金字塔形几