نتایج جستجو برای: complex cobalt ii

تعداد نتایج: 1332367  

Journal: :Environmental Health Perspectives 1992
A Johansson T Curstedt C Jarstrand P Camner

In earlier inhalation exposures of rabbits, nickel increased the production of surfactant by type II cells, with secondary effects on morphology and function of alveolar macrophages. Cobalt induced mainly a nodular growth pattern of the type II cells. Trivalent chromium seemed to impair the capacity of macrophages to catabolize surfactant but did not affect the type II cells. We exposed rabbits...

Journal: :Angewandte Chemie 2009
Cameron Jones Christian Schulten Richard P Rose Andreas Stasch Simon Aldridge William D Woodul Keith S Murray Boujemaa Moubaraki Marcin Brynda Giovanni La Macchia Laura Gagliardi

Low-coordinate, carbonyl-free first row transition metal(I) complexes are relatively rare but are finding increasing use in the activation of small molecules, as enzyme mimics, and so forth. These complexes are generally very reactive species that are stabilized by a variety of sterically bulky, mono-, di-, tri-, and higher dentate ligands. Perhaps the most versatile of these are the b-diketimi...

Journal: :Chemical science 2017
Xue Xu Yong Wang Xin Cui Lukasz Wojtas X Peter Zhang

For the first time, α-formyldiazoacetates have been successfully applied for the asymmetric cyclopropanation of alkenes via Co(ii)-based metalloradical catalysis. The cobalt(ii) complex of the D2-symmetric chiral amidoporphyrin [Co(3,5-Di t Bu-ChenPhyrin)] is an effective metalloradical catalyst that can activate α-formyldiazoacetates to cyclopropanate both aromatic and aliphatic olefins with v...

2016
Peer Schrapers Stefan Mebs Sebastian Goetzl Sandra E. Hennig Holger Dau Holger Dobbek Michael Haumann

A cobalamin (Cbl) cofactor in corrinoid iron-sulfur protein (CoFeSP) is the primary methyl group donor and acceptor in biological carbon oxide conversion along the reductive acetyl-CoA pathway. Changes of the axial coordination of the cobalt ion within the corrin macrocycle upon redox transitions in aqua-, methyl-, and cyano-Cbl bound to CoFeSP or in solution were studied using X-ray absorption...

B. Khodaverdiloo N. Samadi, R. Ansari

Chelating resins have been considered to be suitable materials for the recovery of heavy metals in water treatments. A chelating resin based on modified poly(styrene-alt-maleic anhydride) with Melamine was synthesized. This modified resin was further reacted with 1,2-diaminoethan in the presence of ultrasonic irradiation for the preparation of a tridimensional chelating resin on the nanoscale f...

2007
Lesław Sieroń

The asymmetric unit of the title compound, (C(6)H(6)N(3))[CoCl(3)(C(6)H(5)N(3))]·H(2)O, contains two crystallographically independent cations, two anions and two water mol-ecules. The structure has been reported previously [Zhang, Li, Wang, Xie, Wang & Shen (2004 ▶). Acta Cryst E60, m498-m500] as a neutral cobalt(III) complex accompanied by unprotonated benzotriazole mol-ecules and here has bee...

2017
Xue Xu Yong Wang Xin Cui Lukasz Wojtas X. Peter Zhang

For the first time, a-formyldiazoacetates have been successfully applied for the asymmetric cyclopropanation of alkenes via Co(II)-based metalloradical catalysis. The cobalt(II) complex of the D2symmetric chiral amidoporphyrin [Co(3,5-DiBu-ChenPhyrin)] is an effective metalloradical catalyst that can activate a-formyldiazoacetates to cyclopropanate both aromatic and aliphatic olefins with varie...

Journal: :Journal of Materials Science and Chemical Engineering 2023

New cobalt(II) complex, [Co(O2C15H11N2S)2(OH2)2]∙2H2O (1∙2H2O), has been synthesized upon reaction of cobalt chloride hexahydrate (Co(Cl)2∙6H2O) with 3-methyl-1-Phenyl-4-(2-thienoyl)-pyrazol-5-one (referred as HL) in ethanol at room temperature. Single crystal X-ray diffraction (XRD), spectroscopic methods, and microelemental analyses were used to characterize 1∙2H2O. Compound 1∙2H2O crystalliz...

Journal: :Applied sciences 2021

In this study a cobalt(II) complex of quercetin was synthetized in the solid state with general formula Co(C15H9O7)2∙2H2O. The FT-IR, elemental analysis, and UV/Vis methods were used to composition water solution. anti-/pro-oxidant activity Co(II) studied by means spectrophotometric DPPH (2,2-diphenyl-1-picrylhydrazyl), FRAP (ferric reducing antioxidant activity) Trolox oxidation assays. cytoto...

2003
Aurel Pui

The study discusses the possible binding of molecular oxygen to some new CoII complexes with the Schiff base ligands of the Co(Salen) type. The investigated complexes of CoII with the Schiff bases are: (bis(5-nitro-salicylaldehyde)ethylenediaminato)cobalt(II), Co(NSalen); (bis( -ethylene-salicylaldehyde)ethylenediaminato)cobalt(II), Co(EtSalen); (bis( -ethylene-3,5-diiode-salicylaldehyde)ethyle...

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