Strained metal bonding environments in methylindium dithiolates and their reactivity as initiators for the ring-opening polymerization of cyclic esters
作者:Glen G. Briand、Stefan A. Cairns、Andreas Decken、Courtney M. Dickie、Thomas I. Kostelnik、Michael P. Shaver
DOI:10.1016/j.jorganchem.2016.01.020
日期:2016.3
We have synthesized indium complexes containing a variety of metal bonding environments through use of polyfunctional dithiolate ligands and examined their reactivity as initiators for the ring-opening polymerization of l-lactide, rac-lactide, ε-caprolactone and β-butyrolactone. The facile reaction of Me3In with the corresponding polyfunctional dithiols in toluene, thf or diethyl ether resulted in
我们已合成含有多种金属键合环境,通过使用多官能二硫醇盐配位体的铱络合物,检查它们的反应性引发剂的开环聚合升-丙交酯,外消旋丙交酯,ε-己内酯和β-丁内酯。Me3In与相应的多官能二硫醇在甲苯,thf或乙醚中的易反应导致形成[MeIn(SOOS)] 2(3),MeIn(SNNS)(4),[MeIn(ONS2)] 3(5 ),MeIn(NNS2)(6),MeIn(NNS2Pr)(7)和MeIn(pyrS)2(8)。3和5的固态结构分别显示对应的配体与未配位的配体O原子为三齿的。二聚体(3)和三聚体(5)结构是由短分子间In…S相互作用产生的。在扭曲的三角双锥体键合环境中,所有结构均显示五个坐标铟中心,但施主原子(eq / ax)的排列不同:SSC / OS(3,5),SNC / NS(4),SSN / NC(6), SSC / NS(7)和SSC / NN(8)。对模型MeIn(SMe)2(N