Zirconocene Complexes as Catalysts for the Cycloaddition of CO
<sub>2</sub>
to Propylene Oxide
作者:So Han Kim、Duseong Ahn、Yi Young Kang、Min Kim、Ki‐Soo Lee、Junseong Lee、Myung Hwan Park、Youngjo Kim
DOI:10.1002/ejic.201402782
日期:2014.10
Six zirconocene derivatives were systematically designed; one of the cyclopentadienyl (Cp) ligands of zirconocene dichloride [Cp2ZrCl2] was silylated and this group was then incrementally increased in size; furthermore, one derivative with a 4,4′-disilylbiphenyl bridge between the two zirconocene fragments was prepared. One zirconium complex was characterized by single-crystal X-ray analysis. All zirconium
系统设计了六种二茂锆衍生物;二氯化锆 [Cp2ZrCl2] 的环戊二烯基 (Cp) 配体之一被甲硅烷基化,然后该基团的大小逐渐增加;此外,制备了一种在两个二茂锆片段之间具有 4,4'-二甲硅烷基联苯桥的衍生物。一种锆配合物通过单晶 X 射线分析表征。所有锆配合物都是将 CO2 环加成到环氧丙烷的有效催化剂。含有连接到 SiMe2 基团的联苯基的两种配合物显示出比其他配合物更高的活性。此外,在所有报道的锆配合物中,含有联亚苯基双(二甲基甲硅烷基)桥的双核配合物显示出最高的活性。此外,