Evaluating the influence of the diamine unit (ethylenediamine, piperazine and homopiperazine) on the molecular structure, physical chemical properties and superoxide dismutase activity of copper complexes
作者:Wagner S. Terra、Sarah S. Ferreira、Rafael O. Costa、Luisa L. Mendes、Roberto W.A. Franco、Adailton J. Bortoluzzi、Jackson A.L.C. Resende、Christiane Fernandes、Adolfo Horn
DOI:10.1016/j.ica.2016.06.024
日期:2016.8
three copper(II) complexes are presented. The complexes were synthesized with similar ligands that differ from each other in their diamine units (ethylenediamine, piperazine and homopiperazine). Two propanamide units were attached to these diamines, resulting in tetradentate ligands that induce N 2 O 2 coordination to the copper(II) ions. The X-ray analyses of the complexes showed that the complex containing
摘要介绍了三种铜(II)配合物的合成,表征和超氧化物歧化酶(SOD)模拟活性。合成的复合物具有相似的配体,它们的二胺单元(乙二胺,哌嗪和高哌嗪)彼此不同。两个丙酰胺单元连接到这些二胺上,产生四齿配体,该配体诱导N 2 O 2与铜(II)离子配位。配合物的X射线分析表明,含有乙二胺单元的配合物呈方形平面几何形状,而由于顶端存在水,因此含有哌嗪和高哌嗪的配合物的结构呈方形金字塔形。溶液中的研究表明,该络合物在水中显示出伪八面体的几何形状。对于包含乙二胺和高哌嗪的络合物,在DMSO溶液中保持这种几何形状。但是,含有哌嗪的配合物在DMSO解决方案中呈现出五个配位的铜中心。这三种复合物均表现出高SOD样活性,其IC 50值在纳摩尔范围内(100–200 nmol dm -3)。
Thermochromic nitro–nitrito interconversion mediated by weak-linked amide in nickel (II) diaminodiamide complexes in the solid state
a reversible process. For purposes of comparison, the green nickel (II) complex [Ni (C10H22N4O2) (H2O)2]·2 (NO2)·2H2O (4) was synthesized from an aqueous solution containing nickel chloride, sodium nitrite and 4,7-dimethyl-4,7-diazadecanediamide (2). The NO2− ions are not coordinated to the nickel metal center. On heating the solid complex 4, neither color change nor spectral modifications were observed
Synthesis of Hetero- and Homo-multinuclear Complexes with a Tetracyanonickelate Anion: Structural Characterization [Cu(bcen)Ni(CN)4]2
作者:Rasoul Vafazadeh、Amin Dehghani-Firouzabadi、Anthony C. Willis
DOI:10.17344/acsi.2017.3577
日期:2017.9.10
Two new complexes [Cu(bcen)Ni(CN)4]2 (1) and [Ni(bcen)Ni(CN)4] (2) where bcen is 4,7-diazadecanediamide, were synthesized by reaction of equimolar amounts of M(NO3)2 (M = Cu and Ni), bcen ligand and K2[Ni(CN)4]. Single-crystal X-ray diffraction analysis of compound 1, shows that the bcen ligand acts as a tridentate chelate, coordinating to the Cu(II) ion via the two nitrogen atoms of the amine groups
Synthesis, molecular structure and spectral analysis: DFT–TDDFT computational study of ruthenium complex of tetradentate N,N′-bis(benzimidazole-2yl-ethyl)-ethylenediamine
作者:Hernández J. Guadalupe、Jayanthi Narayanan、Thangarasu Pandiyan
DOI:10.1016/j.molstruc.2011.01.005
日期:2011.3
Abstract Ruthenium complex of N,N ′ - bis(benzimidazol-2-yl-ethyl)ethylenediamine (L 1 ) was prepared and characterized by analytical methods. Structural and spectral properties of N,N ′ - bis(benzimidazol-2-yl-ethyl)ethylenediamine (L 1 ), its dianionic structure (L 2 ), and their complexes such as [RuL 1 Cl(PPh 3 )] + and [RuL 2 Cl(PPh 3 )] + were studied by DFT. In the structures, the ruthenium ion is