86, and 74% yields, respectively. X-ray analyses revealed that complexes 3 and 4 feature intramolecular coordination of an OMe group to the metal ions. Both AlMe4 fragments in complexes 3 and 4 coordinate to the metal centers in a κ2 mode, while in Nd complex 2 one AlMe4 group adopts a κ2 and the second a κ3-coordination mode. Complexes 1–4 were evaluated as precatalysts for isoprene polymerization
该可分离的双(tetramethylaluminate)
镧系络合物[2-R 2,6-XC 6 H ^ 4 NC(吨丁基)(2,6--R 1 2 C ^ 6 ħ 3)] LN(阿尔梅4)2(R 1 = R 2 = X = Me,Ln = La(1); R 1 = R 2 = X = Me,Ln = Nd(2); R 1 = iPr,R 2 = H,X = OMe,Ln = La(3) ; R 1 = iPr,R 2 = H,X = OMe,Ln = Nd(4)),由二价和三齿
配体脒是由脒的反应合成协调2,6-ME 2 ç 6 ħ 3 N = C(吨丁基)NH-2,6-ME 2 ç 6 ħ 3和图2, 6-我
镨2 ç 6 ħ 3 N = C(吨丁基)NH-2- MeOC 6 H ^ 4其中Ln(阿尔梅4)3(Ln为
镧,
钕),并在81中分离,75%,86和74 %收率分别。X射线分析显示复合物3