Synthesis, Characterization, and Lactide Polymerization Activity of Group 4 Metal Complexes Containing Two Bis(phenolate) Ligands
作者:Andreas Sauer、Jean-Charles Buffet、Thomas P. Spaniol、Haruki Nagae、Kazushi Mashima、Jun Okuda
DOI:10.1021/ic300271h
日期:2012.5.21
series of group 4 metal complexes Zr-(1)2, Zr-(2)2, Zr-(3)2, Zr-(4)2, Zr-(5)2, Hf-(1)2, and Hf-(4)2 containing two bridged bis(phenolate) ligands of the (OSSO)-type were prepared by the reaction of the corresponding bis(phenol) and group 4 metal precursor MX4 (X = OiPr, CH2Ph) and isolated as robust, colorless crystals. NMR spectra indicate D2 symmetry, in agreement with the solid state structure determined
一系列第4组金属配合物Zr-(1)2,Zr-(2)2,Zr-(3)2,Zr-(4)2,Zr-(5)2,Hf-(1)2和HF-(4)2含有两个桥连的双(酚盐)的(OSSO)型的配位体是由相应的二的反应(酚)和组4的金属前体MX制备4(X = O我PR,CH 2博士)并分离为坚固,无色的晶体。NMR光谱表明D 2对称,与配合物Zr-(1)2,Hf-(1)2,Zr-(3)2,Zr-(4)2和Zr-(1)2的单晶X射线衍射研究确定的固态结构一致Zr-(5)2。具有1,4-二硫代丁二烷基桥接配体的配合物在金属中心周围表现出高度对称的配位。引入刚性的反式-1,2-环己二基桥连导致围绕在金属中心一个扭曲的协调配体的Zr(4)2和的Zr(5)2当邻位取代基是叔-丁基和对位取代基大于甲基。络合物Zr-(1)2,Zr-(2)2,Zr-(3)2,Zr-(4)2以及Hf-(1)2和Hf-(4)2引发开环在100°