نتایج جستجو برای: cuii determination

تعداد نتایج: 251442  

Journal: :Acta crystallographica. Section C, Crystal structure communications 2006
Joanne L Coyle Anna Fuller Vickie McKee Jane Nelson

The imine podands tris[(2-nitrobenzylidene)aminoethyl]amine and tris[(2-nitrobenzylidene)aminopropyl]amine both stabilize copper(I), forming {tris[(2-nitrobenzylidene)aminoethyl]amine-kappa4N}copper(I) perchlorate acetonitrile disolvate, [Cu(C27H27N7O6)]ClO4.2CH3CN, (II), and {tris[(2-nitrobenzylidene)aminopropyl]amine-kappa4N}copper(I) perchlorate, [Cu(C30H33N7O6)]ClO4, (VI), respectively. The...

Journal: :Chemphyschem : a European journal of chemical physics and physical chemistry 2004
Robert A W Dryfe Erich C Walter Reginald M Penner

The deposition of metal nanostructures (wires and particles) on a graphite surface from an aqueous electrolyte solution was induced by galvanic displacement, via the oxidation of insoluble crystals of a ferrocene derivative (either n-butyl ferrocene or decamethyl ferrocene) present on the same substrate. Micron-to-millimetre-scale crystallites of decamethyl ferrocene were deposited on the graph...

Journal: :Chemistry 2014
Zhifeng Mao Fei Huang Haifeng Yu Jiping Chen Zhengkun Yu Zhaoqing Xu

The functionalization of internal olefins has been a challenging task in organic synthesis. Efficient CuII-catalyzed trifluoromethylation of internal olefins, that is, α-oxoketene dithioacetals, has been achieved by using Cu(OH)2 as a catalyst and TMSCF3 as a trifluoromethylating reagent. The push-pull effect from the polarized olefin substrates facilitates the internal olefinic C-H trifluorome...

Journal: :Angewandte Chemie 2021

This paper describes structural elucidation of a layered conductive metal-organic framework (MOF) material Cu3(C6O6)2 by microcrystal electron diffraction with sub-angstrom precision. insight enables the first identification an unusual π-stacking interaction in MOF characterized extremely short (2.73 Å) close packing ligand arising from pancake bonding and ordered water clusters within pores. B...

Journal: :European Journal of Inorganic Chemistry 2023

The pyridylalkylamine copper complex [Cu(tmpa)(L)]2+ has previously been proposed to reduce dioxygen via a dinuclear resting state, based on experiments in organic aprotic solvents using chemical reductants. Conversely, mononuclear reaction mechanism was observed under electrochemical conditions neutral aqueous solution. We have investigated the oxygen and hydrogen peroxide reduction catalysed ...

Journal: :Magnetochemistry 2021

Three new ionic salts containing [M(CN)8]4? (M = MoIV and WIV) were prepared using large complex cations based on a non-conventional motif built with the tris(2-aminoethyl)amine (noted hereafter tren) ligand, [{M’(tren)}3(?-tren)]6+ (M’ CuII ZnII). The crystal structures of three compounds show that atomic arrangement is formed by relatively isolated anionic cationic entities. irradiated blue l...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1389

fluorescence chemical sensors for the highly sensitive and selective determination of pb2+ , hg2+, co2+ and fe3+ ions in aqueous solutions are described. the ion sensing system was prepared by incorporating lipophilic ligand (l) as a neutral ion-selective fluoroionophore in the plasticized pvc membrane containing sodium tetraphenylborate or potasium tetrakis (p-chlorophenyl) borate as a liphoph...

Journal: :Angewandte Chemie 2021

Metal-catalyzed C–N cross-coupling generally forms C−N bonds by reductive elimination from metal complexes bearing covalent C- and N-ligands. We have identified a Cu-mediated that uses dative N-ligand in the bond-forming event, which, contrast to conventional methods, generates reactive cationic products. Mechanistic studies suggest process operates via transmetalation of an aryl organoboron Cu...

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