isolated yields. These complexes were well-characterized by elemental analysis and NMR spectroscopy. 1, 2 and 4 were structurally determined by single crystal X-ray diffraction. The catalyst systems of 1–5/AliBu3/[Ph3C][B(C6F5)4] were able to promote styrene polymerization to afford pure and highly syndio-tactic polystyrene (rrrr > 99%). Among these rare-earth metal complexes, the complexes with the central
                                    稀土
金属三(邻-二甲基
氨基苄基)配合物Ln(CH 2 C 6 H 4 NMe 2 - o)3与1当量的酸碱反应。
甲苯中
吡咯基改性的芳基酰胺
配体2,5-Me 2 C 4 H 2 NSiMe 2 NHC 6 H 4 R(R = H,Cl- p,OMe- p)得到的(2,5-Me 2 C 4 H 2 NSiMe 2 NC 6 H 5)Ln(CH 2 C 6H 4 NMe 2 - o)2(Ln = Sc(1),Y(2),Lu(3)),(2,5-Me 2 C 4 H 2 NSiMe 2 NC 6 H 4 Cl- p)Y( CH 2 ç 6 ħ 4 NME 2 - ø)2(4),和(2,5-ME 2 c ^ 4 ħ 2 NSiMe 2 NC 6 H ^ 4 OMe- p)Y(CH 2 C 6 H 4 NMe 2 - o)2(5)的分离产率很高。这些配合物通过元素分析和NMR光谱得到了很好的表征。1,2和4被结构上由单晶X射线衍射来确定。1