Synthesis and Structural Studies of Lithium and Sodium Complexes with OOO-Tridentate Bis(phenolate) Ligands: Effective Catalysts for the Ring-Opening Polymerization of <scp>l</scp>-Lactide
作者:Yong Huang、Yueh-Hsuan Tsai、Wen-Chou Hung、Chieh-Shen Lin、Wei Wang、Jui-Hsien Huang、Saikat Dutta、Chu-Chieh Lin
DOI:10.1021/ic1011154
日期:2010.10.18
dinuclear nature of complexes 1 and 3 was confirmed from their molecular structure. Complexes 2 and 6 illustrate tetranuclear species; however, complex 4 shows a mononuclear feature. A p−π interaction exists from the phenyl ring of the 2-(methyl-1-phenylethyl) groups to the central metal in complexes 2, 4, and 6, which could effectively stabilize the metal center. Among them, complexes 1, 2, and 5−9 displayed
已合成并充分表征了一系列具有OOO-三齿双(酚盐)配体的锂和钠配合物。2,2'-二羟基-3,3',5,5'-四[(1-甲基-1-苯基)乙基]二苄醚(L 1 -H 2)与不同比例的n BuLi在甲苯中的反应用四氢呋喃或四氢呋喃(THF)分别得到[Li 2(L 1 -H)2 ](1),[Li 4 L 1 2 ](2)和[Li 2 L 1(THF)3 ](3)。同样,[Na(L 1 -H)(THF)](4),[Na通过L 1 -H 2与NaN [Si(CH 3)3 ] 2或钠金属的反应制备[ 2(L 1 -H)] 2(5)和[Na 4 L 1 2 ](6)。此外,2,2'-二羟基-3,3',将反应5,5'-四-叔-butyldibenzyl醚(L 2 -H 2)与Ñ BuLi的甲苯或THF中产生锂2(L 2 - H)2 ](7)和[Li 2(L 2 -H)2(THF)2 ](8)。用2摩尔当量的苄醇进一步处理7,得到[Li