School of Chemistry and Chemical Engineering, Suzhou University, Suzhou 234000, China.
Molecules. 2020 Apr 30;25(9):2101. doi: 10.3390/molecules25092101.
Two mononuclear zero-dimensional Ni(II) and Zn(II) complexes bearing diethylenetriamine derivative ligand, namely [NiL(CHCOO)(HO)] () and [ZnL(CHCOO)] () [L = N, N'-bis(2-hydroxybenzyl)diethylenetriamine], were synthesized under reflux conditions. The molecular composition and structure of the complexes were identified by IR, PXRD, elemental analyses, and single crystal X-ray diffraction. Complex belongs to a monoclinic crystal system with the 2/ space group, and Complex belongs to a monoclinic crystal system with the 2/ space group. The Henry reaction of nitromethane with aromatic aldehydes was explored with Complexes and as the catalyst. Results from the catalytic reaction revealed that the complexes displayed excellent catalytic activities under the optimized conditions and that the substrate scope of aromatic aldehydes could be extended to a certain extent. In addition, the possible catalytic mechanism of the Henry reaction was also deduced.
两个单核零维的 Ni(II) 和 Zn(II) 配合物，分别以二乙三胺衍生物配体NiL(CHCOO)(HO)和ZnL(CHCOO)（L=N，N'-双(2-羟基苄基)二乙三胺）为配体，在回流条件下合成。通过红外光谱、粉末 X 射线衍射、元素分析和单晶 X 射线衍射确定了配合物的分子组成和结构。配合物属于单斜晶系，空间群为 2/，配合物属于单斜晶系，空间群为 2/。以配合物NiL(CHCOO)(HO)和ZnL(CHCOO)为催化剂，对硝基甲烷与芳香醛的 Henry 反应进行了探索。催化反应的结果表明，在优化条件下，配合物表现出优异的催化活性，并且芳香醛的底物范围可以在一定程度上扩展。此外，还推导出了 Henry 反应的可能催化机理。
