Syntheses and crystal structures of Ni(II) complexes with pyridine-based macrocyclic ligands
作者:Eva Zahradníková、Ivana Císařová、Bohuslav Drahoš
DOI:10.1016/j.poly.2021.115552
日期:2022.1
prepared and thoroughly characterized. Single crystal X-ray structural analysis confirmed that all the complexes have a coordination number of six and their geometries are close to octahedral. In the case of the mononuclear complexes 1 and 2, all the nitrogen atoms of the macrocycle are coordinated, however, in the dinuclear complex 3 with the piperazine-based ligand L3, two nitrogen donor atoms (of the total
三个基于吡啶的大环配体,两个包含一个吡啶悬臂(L 1和L 2),一个在大环支架中包含哌嗪环(L 3),大环的大小从 12-、14- 增加到 30- L 1 – L 3 的元环被合成和表征。一系列 Ni(II) 与所有这些配体形成复合物,分子式为 [Ni L 1 (CH 3 OH)](ClO 4 ) 2 ( 1 ), [Ni L 2 (CH 3 CN)](ClO 4 )2 ( 2 ) 和 [Ni 2 L 3 (DMF) 2 (CH 3 CN) 2 ](ClO 4 ) 4 ( 3 ) (DMF = N , N-二甲基甲 酰胺) 被制备并彻底表征。单晶X射线结构分析证实,所有配合物的配位数均为6,几何形状接近八面体。在单核配合物1和2的情况下,大环的所有氮原子都配位,然而,在双核配合物3 中,配位体L如图3所示,两个氮供体原子(总共十个)是不配位的。所有配合物的第一配位球都是由溶剂分子完成的。的