Aluminum complexes containing biphenolate phosphine ligands: synthesis and living ring-opening polymerization catalysis
作者:Yu-Ning Chang、Pei-Ying Lee、Xue-Ru Zou、Han-Fan Huang、Yi-Wei Chen、Lan-Chang Liang
DOI:10.1039/c6dt02143c
日期:——
This report describes the synthesis, structure, and reactivity of aluminum complexes containing tridentate biphenolate phosphine ligands of the type [RP(2-O-3,5-C6H2tBu2)2]2− (R = tBu (2a), Ph (2b)). Alkane elimination of AlMe3 with one equiv. of H2[2a] or H2[2b] in THF at 0 °C cleanly affords colorless crystalline [2a]AlMe(THF) (3a) and [2b]AlMe(THF) (3b), respectively. An X-ray diffraction study
该报告描述了[RP(2-O-3,5-C 6 H 2 t Bu 2)2 ] 2−(R = t Bu(2a),Ph(2b))。一当量的烷烃消除AlMe 3。于0°C的H 2 [ 2a ]或H 2 [ 2b ]溶液干净地得到无色结晶的[ 2a ] AlMe(THF)(3a)和[ 2b ] AlMe(THF)(3b)), 分别。对3a的X射线衍射研究表明,它是5个配位THF结合的物质,其配位几何形状最好用三角双锥体描述,在轴向位置有磷供体和THF。用一个当量处理原位制备的或分离的甲基络合物3a,b。在甲苯或THF苄醇的生成其相应的benzyloxides [图2a,2b ]的Al(μ 2 -OCH 2 PH)} 2(4A,4B)。X射线衍射对4a的研究揭示了一种二聚体结构,其中铝的配位几何也与三齿2a一起变形为三角双锥体。配体被面部束缚。在一个当量的情况下 苯甲醇的配合物3a是ε-己内酯(ε-CL)和rac-丙交酯(rac