Synthesis and crystal structures of salen-type Cu(<scp>ii</scp>) and Ni(<scp>ii</scp>) Schiff base complexes: application in [3+2]-cycloaddition and A<sup>3</sup>-coupling reactions
作者:Bhumika Agrahari、Samaresh Layek、Rakesh Ganguly、Devendra D. Pathak
DOI:10.1039/c8nj01718b
日期:——
synthesis of two new salen-type Schiff base complexes of the type [Cu(L)]·0.5H2O, 1, and [Ni(L)], 2, from the reaction of a 6,6′-[(1E,1′E)-(cyclohexane-1,2-diylbis(azanylylidene))bis(methanylylidene)bis(3-(diethylamino)phenol)] salen-type Schiff base ligand (H2L) with Cu(OAc)2·H2O and Ni(OAc)2·4H2O in methanol at room temperature, respectively, is described. The complexes are isolated as coloured crystalline
的类型的两个新的沙仑型席夫碱配合物[铜(L)]·0.5H的合成2 O,1,和[镍(L)],2,从的6,6'的反应- [( 1 ë,1' ë) - (环己烷-1,2-二基二(azanylylidene))双(methanylylidene)双(3-(二乙基氨基)苯酚)]沙仑型席夫碱配体(H 2 L)与铜(OAC)2 ·H 2 O和Ni(OAc)2 ·4H 2描述了分别在室温下在甲醇中的O。将该配合物分离为有色结晶固体,并通过元素分析,FT-IR光谱,UV-可见光谱和单晶X射线衍射研究对其进行表征。具有g iso = 2.076的配合物1的顺磁性质已通过EPR研究得到证实,这表明配合物的方形平面几何形状发生了扭曲。与此相反,发现镍络合物本质上是抗磁性的,并且另外通过1 H NMR表征。配合物1和2的晶体结构证实了两种配合物的扭曲的正方形平面几何形状。综合大楼1被发现是一种较好的催化剂,可通过[3
Copper–birhodanine complex immobilized on Fe
<sub>3</sub>
O
<sub>4</sub>
nanoparticles: DFT studies and heterogeneous catalytic applications in the synthesis of propargylamines in aqueous medium
作者:Manuchehr Rezaei、Khaled Azizi、Kamal Amani
DOI:10.1002/aoc.4120
日期:2018.3
Heterogeneous magnetic nanocatalyst, Fe3O4@SiO2–Ligand–Cu (II) MNPs, reveals high catalytic performance within the synthesis of propargylamines using the multicomponent coupling reaction of aldehydes, phenylacetylene and secondary amines in water as a solvent. The substantial feature of this organic–inorganic hybridmagnetic nanocatalyst is the capability of straightforward separation of the reaction
非均相磁性纳米催化剂Fe 3 O 4 @SiO 2-配体-铜(II)MNPs在醛基,苯乙炔和仲胺在水中作为溶剂的多组分偶联反应中,在炔丙基胺的合成中显示出较高的催化性能。这种有机-无机杂化磁性纳米催化剂的主要特征是能够通过外部磁体直接分离反应混合物,该磁体被回收十次而不会显着降低催化活性。这种方法还具有其他优势,例如服从于绿色化学原理,并且避免使用昂贵且有害的有机溶剂。为了研究Birhodanine衍生物-铜(II)配合物的稳定性和实际结构,还进行了DFT计算。
Metal- and catalyst-free, one-pot, three-component synthesis of propargylamines in magnetized water: experimental aspects and molecular dynamics simulation
Magnetized water (MW), as a green-promoting medium, is applied for the one-pot, metal- and catalyst-free, practical, efficient, and environmentally benign three-component reactions of aldehydes, amines, and alkynes. The salient features of this novel methodology are its simplicity, low cost, short reaction time, high reaction yield, easy work-up, and absence of hazardous organic solvents. Moreover
spectroscopic studies. Molecular structures of complexes 1, 2 and 4 were determined by X-ray crystallography. Copper complexes (1-4) were employed as a catalyst for the [3+2] cycloaddition and A3-couplingreactions. A mutual approach of salen-type ligands and metal via active participation of ligands allow to achieve the catalytic reactions. Reaction pathways were proposed and possible intermediate species
Nano magnetite supported metal ions as robust, efficient and recyclable catalysts for green synthesis of propargylamines and 1,4-disubstituted 1,2,3-triazoles in water
Nano magnetite functionalized 2,2′-biimidazole complex of metal ions Cu(I), Cu(II), Ni(II) and Co(II) were successfully synthesized and characterized by different techniques such as elemental analysis, FT-IR spectroscopy, X-ray diffraction (XRD), thermo gravimetric analysis (TGA), transmission electron microscopy (TEM), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM with