The effect of the central donor in bis(benzimidazole)-based cobalt catalysts for the selective cis-1,4-polymerisation of butadiene
作者:Renan Cariou、Juan J. Chirinos、Vernon C. Gibson、Grant Jacobsen、Atanas K. Tomov、George J. P. Britovsek、Andrew J. P. White
DOI:10.1039/c0dt00402b
日期:——
of bis(benzimidazole)-based cobalt(II) dichloride complexes containing a range of different central donors has been synthesized and characterized. The nature of the central donor affects the binding of the ligand to the cobalt centre and determines the coordination geometry of the metal complexes. All complexes have been shown to catalyse the polymerization of butadiene, in combination with MAO as
Cobalt(II) Complex with a Tridentate N Donor Ligand: Synthesis, Crystal Structure, Antioxidation, and DNA Binding Studies
作者:Huilu Wu、Bin Liu、Fan Kou、Fei Jia、Jingkun Yuan、Ying Bai
DOI:10.1002/zaac.201100325
日期:2012.1
that comprises two picrate molecules and one Etbba ligand molecule. The DNA-binding properties of the cobalt(II) complex were investigated by electronic absorption and fluorescence spectroscopy, as well as viscosity measurements. The experimental results suggest that the cobalt(II) complex binds to DNA in an intercalating mode. In addition, the complex shows strong scavenging effects for hydroxyl radicals
三齿双(N-乙基苯并咪唑-2-基甲基)苯胺(Etbba)的七配位单核钴(II)配合物被合成并表征为[Co(Etbba)(pic)2]·(MeCN)(pic = picrate)通过元素分析、电导率测量以及红外和紫外/可见光谱。钴 (II) 配合物的晶体结构由单晶 X 射线衍射确定。该研究显示金属原子以扭曲的单封端八面体排列,包括两个苦味酸盐分子和一个 Etbba 配体分子。通过电子吸收和荧光光谱以及粘度测量研究了钴 (II) 复合物的 DNA 结合特性。实验结果表明,钴 (II) 复合物以嵌入模式与 DNA 结合。此外,
Synthesis, Crystal Structure and Antioxidation Study of Cadmium(II) Complex with bis(N-Methylbenzimidazol-2-ylmethyl)aniline
A complex of cadmium(II) picrate (pic) with bis(N-methylbenzimidazol-2-ylmethyl)aniline (Mebba), with composition [Cd(Mebba)2](pic)2, was synthesized and characterized by elemental analysis, electrical conductivity, IR and UV/visible spectral measurements. The crystal structure of the cadmium(II) complex has been determined by single-crystal X-ray diffraction. The Cd(II) cation is bonded to two Mebba ligands through four benzimidazole nitrogen atoms and two aniline nitrogen atoms, resulting in a distorted octahedral geometry. The ligand Mebba and Cd(II) complexes have scavenging effects for hydroxyl radicals and complex shows stronger scavenging effects for hydroxyl radicals.
Syntheses, crystal structures, electrochemical studies, and antioxidant activities of zinc(II) and copper(II) complexes with bis(2-benzimidazolyl) aniline derivatives
作者:Huilu Wu、Jiawen Zhang、Yanhui Zhang、Chengyong Chen、Zhen Li、Mingchang Wu、Zaihui Yang
DOI:10.1080/00958972.2014.1003549
日期:2015.3.4
and [Cu(Mebba)(Br)2]·2DMF (2) have been synthesized and characterized by elemental analyses, molar conductivities, UV–vis spectra, IR spectra, NMR spectroscopy, and X-ray crystallography. The structure around Zn(II) can be described as distorted tetrahedral. Complex 2 can be described as distorted trigonal bipyramidal. Cyclic voltammograms of 2 indicate a quasireversible Cu2+/Cu+ couple. Additionally
Synthesis, crystal structure, electrochemistry and antioxidative activity of copper(II), manganese(II) and nickel(II) complexes containing bis(<i>N</i>
-ethylbenzimidazol-2-ylmethyl)aniline
作者:Huilu Wu、Hongping Peng、Yanhui Zhang、Fei Wang、Han Zhang、Cuiping Wang、Zaihui Yang
DOI:10.1002/aoc.3313
日期:2015.7
Bis(N‐ethylbenzimidazol‐2‐ylmethyl)aniline (Etbba) and its transition metal complexes, [Cu(Etbba)(Cl)2]⋅DMF (1), [Mn(Etbba)(Cl)2] (2) and [Ni(Etbba)(Cl)2] (3), have been synthesized and characterized on the basis of elemental analysis, molar conductivity, UV–visible, infrared and NMR spectroscopies and X‐ray crystallography. The coordination environment of complex 1 can be described as distorted square‐based