Dinuclear cobalt complexes supported by biphenol and binaphthol-derived bis(salicylaldimine) ligands: synthesis, characterization and catalytic application in β-enaminone synthesis from 1,3-dicarbonyl compounds and aliphatic amines
作者:Adelew Estifanos Filkale、Chandni Pathak
DOI:10.1039/d0nj00052c
日期:——
(5–300 K) showed that the complexes exhibit weak antiferromagnetic (AF) interactions. Both metal complexes 2 and 4 successfully catalysed the synthesis of β-enaminones from 1,3-dicarbonyl compounds and aliphatic amines under ambient conditions.
两个新的四齿配体,即3,3'-双[(((2,4,6-三甲基-苯基)亚氨基)甲基]甲基]-[1,1']-联苯-2,2'-二醇,H 2 L 1(1)和3,3'-双[(((2,4,6-三甲基苯基)亚氨基)甲基]-[1,1']-联萘-2,2'-二醇,H 2 L 2(3),基于2,2'-联苯酚和2,2'-联萘酚骨架已经合成并表征。相应地,双核钴配合物Co [3,3'-双-((R)-亚氨基甲基)-(1,1')-联苯-2,2'-二氧代]} 2(2)和Co [3, 3'-双-(((R)-亚氨基甲基)-(1,1')-联萘-2,2'-二氧代]} 2(4)(其中R = 2,4,6-Me 3 C 6通过各个配体与四水合乙酸钴的反应合成H 2)。然后通过元素分析,质谱,IR,UV-vis,磁化率和单晶X射线衍射分析对复合物进行表征。X射线单晶晶体学研究表明,2和4中每种金属离子的四面体几何形状均发生了扭曲。在不同温度下(5-300