نتایج جستجو برای: bimetallic complexes
تعداد نتایج: 140785 فیلتر نتایج به سال:
Pt monometallic and Pt-Co bimetallic catalysts have been prepared on single-walled carbon nanotubes (SWNT) with and without HNO3 treatment. The HNO3 treatment introduced oxygen containing groups (OCGs), which affect both the structure and activity of the catalyst. The introduction of OCGs does not affect the structure of Pt monometallic catalysts but increased the dispersion in the bimetallic c...
Abstract Nickel-catalyzed reductive homocoupling of aryl ethers has been achieved with Mg(anthracene)(thf)3 as a readily available low-cost reductant. DFT calculations provided rationale for the specific efficiency diorganomagnesium-type two-electron reducing agent. The show that dianionic anthracene-9,10-diyl ligand reduces two ether substrates, resulting in reaction through supply electrons t...
Cocrystals of one-dimensional cyanide-bridged Cu-Cr or Cu-Co bimetallic assemblies and mononuclear Cu complexes, [Cu(chxn)2]3[M(CN)6]2·4H2O (chxn = trans-cyclohexane-(1R,2R)-diamine; M = Cr for 1 and Co for 2), and two-dimensional cyanide-bridged Cu-Fe bimetallic assembly, [Cu(N-Eten)2]3[Fe(CN)6]2·4H2O (N-Eten = Nethylethylenediamine) (3), were prepared and characterized structurally. Crystal s...
The connection of lipophilic gallic acid derivatives at the 5,5'- or 6,6'-positions of the rigid 2,6-bis(1-ethyl-benzimidazol-2-yl)pyridine core provides two pro-mesogenic tridentate ligands L10 and L12, whose molecular shapes, anisometries, and directional intermolecular pi-stacking can be tuned. X-ray diffraction data in the crystalline state, combined with solution 1H NMR measurements, show ...
We present a detailed study of the mechanism for oxidative heteroarylation, based on DFT calculations and experimental observations. We propose binuclear Au(II)-Au(II) complexes to be key intermediates in the mechanism for gold catalyzed oxidative heteroarylation. The reaction is thought to proceed via a gold redox cycle involving initial oxidation of Au(I) to binuclear Au(II)-Au(II) complexes ...
O-Functionalised salen ligands were employed as bridging ligands in the synthesis of homo- and heterometallic salen complexes with early and late transition metals (H(2)salen: N,N'-bis(salicylidene)ethylenediamine, systematic name: 2,2'-{ethane-1,2-diylbis(nitrilomethylidine)}diphenol). A new type of O-functionalised salen ligand was synthesised, which contains alkyl groups to enhance the solub...
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