ChemInform Abstract: Mononuclear and Binuclear Complexes with Binucleating Ligands, Involving Pyrrole, Imidazole and Salicylaldehyde Derivatives

Abstract New binucleating ligands, (L1) N ,N′,N″,N‴-tetrakis(2-benzimidazolylmethyl)-1,4,9,12-tetra-azacyclohexadecane, and (L2) N ,N′,N″,N‴-tetrakis(2-benzimidazolylmethyl)-1,4,11,14-tetra-azacycloeicosane were prepared. From the reaction mixture of copper(II) salt and the ligand, new binuclear copper(II) complexes, Cu2(L1) (NO3)4 (1), Cu2(L2)(NO3)4 (2), Cu2(L2)Br4 (3), and trinuclear complexes, Cu3(L1)Cl6 (4), and Cu3(L2)Cl6 (5) were obtained. Cyclic voltammograms revealed that the trinuclear complexes 4 and 5 are composed with the binuclear complex (1 or 2) and [CuCl4]2-. The interaction between two metal ions in the binuclear complexes are confirmed on the basis of the ESR spectra. These binuclear complexes exhibit higher catalytic activity for the oxidation of TMPD by O2 molecule than those of structurally rigid binuclear copper(II) complexes and of flexible binuclear complexes in which two copper(II) coordination sites are linked by a single polyatomic chain.

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Mononuclear and binuclear copper(II) complexes of some polyfunctional pyridyl phthalazines

Canadian Journal of Chemistry ◽

10.1139/v83-010 ◽

1983 ◽

Vol 61 (1) ◽

pp. 57-62 ◽

Cited By ~ 20

Author(s):

Graham Bullock ◽

Frederick W. Hartstock ◽

Laurence K. Thompson

Keyword(s):

Magnetic Moments ◽

Coupled Systems ◽

Binuclear Complexes ◽

Antiferromagnetic Exchange ◽

Binuclear Copper ◽

Copper Salts ◽

Mononuclear Complexes ◽

Acidic Conditions ◽

Binucleating Ligands ◽

Protonated Ligand

Mononuclear and binuclear copper(II) complexes of the potentially tetradentate binucleating ligands 1,4-di(3′-methyl-2′-pyridyl)aminophthalazine (PAP3Me) and 1,4-di(5′-methyl-2′-pyridyl)aminophthalazine (PAP5Me) are reported. In the case of the ligand 1,4-di(4′,6′-dimethyl-2′-pyridyl)aminophthalazine (PAP46DiMe) only binuclear derivatives were obtained. The mononuclear complexes, involving protonated ligand, result from the sensitivity of these ligands to mildly acidic conditions in aqueous solutions of certain copper salts. Binuclear, neutral ligand, complexes are also formed when the pH increases. Hydroxy bridged binuclear structures exist in all the binuclear complexes described with the exception of one acetate bridged derivative. Sub normal magnetic moments are observed for all the binuclear complexes (< 1.74 BM) indicating spin coupled systems with very low values (< 0.88 BM) for binuclear complexes of PAP46DiMe, indicating the possibility of strong antiferromagnetic exchange between the metal centres.

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Structural peculiarities of binuclear complexes of copper (I) with 10-m- (aryl)phenoxarsines

Журнал структурной химии ◽

10.26902/jsc_id65960 ◽

2020 ◽

Vol 61 (12) ◽

Keyword(s):

Binuclear Complexes ◽

Structural Peculiarities

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ChemInform Abstract: NOVEL MODE OF REDUCTION OF PHOSPHIDO-BRIDGED, METAL-METAL-BONDED BINUCLEAR COMPLEXES. SYNTHESIS AND REACTIVITY OF AN UNSYMMETRICAL ANION FROM BIS(μ-DIPHENYLPHOSPHIDO)HEXACARBONYLDIIRON (FE2(CO)6(μ-PPH2)2)

Chemischer Informationsdienst ◽

10.1002/chin.198343288 ◽

1983 ◽

Vol 14 (43) ◽

Author(s):

Y.-F. YU ◽

J. GALLUCCI ◽

A. WOJCICKI

Keyword(s):

Binuclear Complexes ◽

Metal Metal

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Utilization and simulation of innovative new binuclear Co(ii), Ni(ii), Cu(ii), and Zn(ii) diimine Schiff base complexes in sterilization and coronavirus resistance (Covid-19)

Open Chemistry ◽

10.1515/chem-2021-0068 ◽

2021 ◽

Vol 19 (1) ◽

pp. 772-784

Author(s):

Moamen S. Refat ◽

Ahmed Gaber ◽

Walaa F. Alsanie ◽

Mohamed I. Kobeasy ◽

Rozan Zakaria ◽

...

Keyword(s):

Schiff Base ◽

Molecular Docking ◽

Metal Ions ◽

Free Ligand ◽

Schiff Base Complexes ◽

Hydroxyl Groups ◽

Binuclear Complexes ◽

Central Metal ◽

H Nmr ◽

Biological Studies

Abstract This article aimed at the synthesis and molecular docking assessment of new diimine Schiff base ligand, namely 2-((E)-(2-((Z)-2-(4-chlorophenyl)-2-hydroxyvinyl)hydrazono) methyl)-6-methoxyphenol (methoxy-diim), via the condensation of 1-(4-chloro-phenyl)-2-hydrazino-ethenol compound with 2-((E)-(2-((Z)-2-(4-chlorophenyl)-2-hydroxy vinyl) hydrazono)methyl)-6-methoxyphenol in acetic acid as well as the preparation of new binuclear complexes of Co(ii), Ni(ii), Cu(ii), and Zn(ii). The following synthesized complexes were prepared in a ratio of 2:1 (metal/ligand). The 1H-NMR, UV-Vis, and FTIR spectroscopic data; molar conductivity measurements; and microanalytical, XRD, TGA/DTG, and biological studies were carried out to determine the molecular structure of these complexes. According to the spectroscopic analysis, the two central metal ions were coordinated with the diamine ligand via the nitrogen of the hydrazine and oxygen of the hydroxyl groups for the first metal ions and via the nitrogen of the hydrazine and oxygen of the phenol group for the second metal ions. Molecular docking for the free ligand was carried out against the breast cancer 3hb5-oxidoreductase and the 4o1v-protein binding kidney cancer and COVID-19 protease, and good results were obtained.

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