An Electron-Poor Dioxa-[2.1.1]-(2,6)-pyridinophane Ligand and Its Application in Cu-Catalyzed Olefin Aziridination
作者:Fan Yang、Jiaheng Ruan、Peter Y. Zavalij、Andrei N. Vedernikov
DOI:10.1021/acs.inorgchem.9b02618
日期:2019.11.18
fluxional at 20 °C. In the crystalline copper(I) complex LCuCl, the macrocyclic ligand is also κ2-N,N-coordinated to the metal, but it utilizes two equivalent pyridine fragments for the binding. The copper(I) complex is fluxional in CH2Cl2 solutions in the temperature range between 20 and −70 °C and is proposed to be involved in a fast intermolecular macrocyclic ligand exchange which is slowed down
合成了一种新型的大环1,7-二氧杂-[2.1.1]-(2,6)-吡啶并ligand烷配体,并进行了晶体学表征。制备了两种衍生的金属配合物,二氯钯(II)和氯铜(I)。在钯(II)配合物LPdCl 2中,根据其晶体学特征,无论是固态的,还是在−40°C的CH 2 Cl 2溶液中,根据1 H NMR光谱,配体均适应于C 1-对称的κ 2 - ñ,ñ金属原子与大环的两个非等价吡啶片段结合的-配位模式。该络合物在20°C时具有通量。在结晶铜(I)络合物LCuCl,所述大环配位体也是κ 2 - Ñ,Ñ配位的对金属,但它采用了两个当量吡啶片段用于结合。铜(I)配合物在20至-70°C的温度范围内在CH 2 Cl 2溶液中呈熔体流动,并被提议参与快速的分子间大环配体交换,而交换速度低于-40°C。DFT计算预测,二氧杂吡啶并吡啶并环的化合物LPdCl 2的热力学稳定性较低。与LCuCl和LCuCl相比,它们的[2