Group 4 Metal Complexes Supported by [ONNO]-Type Bis(<i>o</i>-aminophenolato) Ligands: Synthesis, Structure, and α-Olefin Polymerization Activity
作者:Geert-Jan M. Meppelder、Hong-Tao Fan、Thomas P. Spaniol、Jun Okuda
DOI:10.1021/om9004274
日期:2009.9.14
6-tBu2)2NR(CH2)2NR] (R = H, 1; Me, 2) with the appropriate metal precursors MX4 (M = Ti, Zr, Hf; X = Cl, OiPr) gave a series of group 4 metal dichloro and di(isopropoxy) complexes [M2,2′-(OC6H2-4,6-tBu2)2NR(CH2)2NR}X2] (R = H, X = Cl, M = Ti, 3; R = Me, X = OiPr, M = Ti, 4; R = Me, X = Cl, M = Ti, 5; Zr, 6; Hf, 7). While for complexes 3, 4, 6, and 7 single isomers were observed, titanium complex 5 formed as a mixture
1,4-二氮杂丁烷二基桥接的双酚[[HOC 6 H 2 -4,6- t Bu 2)2 NR(CH 2)2 NR](R = H,1 ; Me,2)与合适的金属前体MX 4(M =钛,锆,铪; X =氯,O-我镨),得到一系列的第4族金属和二氯二(异丙氧基)络合物[M 2,2' - (OC 6 H ^ 2 - 4,6- t Bu 2)2 NR(CH 2)2 NR} X 2 ](R = H,X = Cl,M = Ti,3 ; R = Me,X = Oi Pr,M = Ti,4;R = Me,X = Cl,M = Ti,5;Zr,6;,7。虽然络合物3,4,6,和7分的单异构体进行观察,钛络合物5形成为混合物的顺式α(图5a)和顺式- β(图5b)的异构体。可变温度NMR光谱显示钛配合物3和5b不稳定并且在高温下有利于顺式-α配体构型,而4和5a配置稳定。配合物6和7示出刚性Ç 2 -在溶液中对