Neutral Dimethylzirconocene Complexes as Initiators for the Ring‐Opening Polymerization of ϵ‐Caprolactone
作者:Elena Villaseñor、Rubén Gutierrez‐Gonzalez、Fernando Carrillo‐Hermosilla、Rafael Fernández‐Galán、Isabel López‐Solera、Ana Rodríguez Fernández‐Pacheco、Antonio Antiñolo
DOI:10.1002/ejic.201201096
日期:2013.3
derivatives [ZrMe2Si(3-η5-C9H5R)(η5-C5Me4)}Me2] [R = H (12), CH3 (13), CH2Ph (14), C2H4(C4H7O2) (15)] were prepared by treating the corresponding ansa-zirconocene dichloride complex with MgMeBr. Dialkyl derivative [ZrMe2Si3-η5-C9H5(CH2Ph)}(η5-C5Me4)}(CH2SiMe3)2] (16) was prepared by adding 2 equiv. of LiCH2SiMe3 to complex 10. Mixed indenyl/cyclopentadienylzirconocene complexes [Zr(η5-C9H6R)(η5-C5H5)Cl2]
报告了新的二甲基-ansa-和-非-ansa-锆茂配合物的合成、结构和开环聚合 (ROP) 活性。取代的茚前体 1-C9H7R [R = CH3 (1)、CH2Ph (2) 和 C2H4(C4H7O2) (3)] 是通过用茚基锂处理 RBr [R = CH2Ph 和 C2H4(C4H7O2)] 或 MeI 合成的。同样,通过处理锂获得桥联茚基/环戊二烯化合物 [Me2Si(3-C9H6R)(C5Me4H)] [R = H (4), CH3 (5), CH2Ph (6) 和 C2H4(C4H7O2) (7)]适当取代的茚与 ClSiMe2(C5Me4H) 形成的盐。ansa-茚基-环戊二烯基茂金属 [ZrMe2Si(3-η5-C9H5R)(η5-C5Me4)}Cl2] [R = H (8), CH3 (9), CH2Ph (10), C2H4(C4H7O2) (11)]随后通过在甲苯中用 ZrCl4