Bond metal complexes

Polymerization of Ethylene in the Dark with Sigma-Bonded Metal Complexes, Solvent Toluene at 80°C, Partial Pressures of Ethylene 10 atm [catalyst] = 0.003 M... 

J-Bonded metal complexes, hydrodesulfurization models with benzothiophene, 1, 769 with dibenzothiophene, 1, 769 Bonding studies energetics, 1, 285 overview, 1, 573—603 ring size effects, 1, 396 strength, 1, 609... 

Chemically bonding metal complexes to an insoluble solid is a method of preparing catalysts whose active centers have well-defined structures, but the results have yet to be applied to synthesis. Polymer-... 

Infrared absorption occurs not only with organic molecules but also with covalently bonded metal complexes, which are generally active in the longer-wavelength infrared region. Infrared spectrophotometric studies have thus provided much useful information about complex metal ions. 

Regioisomerism Tautomerism Protonation Hydrogen bonding Metal complexation... 

Due to its many advantages, STM at the liquid-solid interface [27] has provided detailed insight into the molecule-substrate (epitaxy [60]) and molecule-molecule interactions (e.g. hydrogen bonding, metal complexation) responsible for the ordering of molecules on the atomically flat surface. It is possible to induce chemical reactions at the liquid-solid interface, via external stimuli (e.g. light), or by manipulation with the STM tip, where the location and orientation of functional groups could be controlled [27]. 

Yaghi, O.M., Li, H., and Groy, T.L. 1996. Construction of porous solids from hydrogen-bonded metal complexes of 1,3,5-benzenetricarboxylic acid. Journal of the American Chemical Society 118, 9096-9101. 

One of the most successful preparative routes for r -bonded metal complexes of thiophenes has been the chemical or electrochemical reduction of the corresponding 18e 1)5 Ru, Rh, and Ir precursors [58-64] upon addition of two extra electrons to complexes like Cp Ir( ri -Th), the thiophenic ligand necessarily transforms from a 6e-donor into a 4e-donor situation in order to avoid oversaturation at the metal center, as exemplified for Cp Ir(2,5-Me2T) in Eq. 2.16. 

Interfacial electron-transfer reactions between polymer-bonded metal complexes and the substrates in solution phase were studied to show colloid aspects of polymer catalysis. A polymer-bonded metal complex often shows a specifically catalytic behavior, because the electron-transfer reactivity is strongly affected by the pol)rmer matrix that surrounds the complex. The electron-transfer reaction of the amphiphilic block copol)rmer-bonded Cu(II) complex with Fe(II)(phenanthroline)3 proceeded due to a favorable entropic contribution, which indicated hydrophobic environmental effect of the copolymer. An electrochemical study of the electron-transfer reaction between a poly(xylylviologen) coated electrode and Fe(III) ion gave the diffusion constants of mass-transfer and electron-exchange and the rate constant of electron-transfer in the macromolecular domain. 

Scheme 11.1 Preparation of covalent Bonded Metal Complex.

Recently, AUen, Lewis, Long, and Oldham (31a) have isolated the first n-bonded metal complex of a neutral acetylacetone molecule. Potassium chlorobis(acetylacetonato)platinate(II),... 

Neutral H-bonded metal complexes as multivalent templates... 

A first study that illustrates the potential of this approach was the preparation of an unprecedented example of genuine supramolecular isomers which exhibits different solid-state reactivity. " The combination of MnCla, NaNCS and frans-l,2-bis(2-pyridyl)ethene (2,2 -bpe) in a mixture of solvents water/ethanol, using two molar metal-bipyridine ratios (1 1 and 1 2), leads to two structurally related 2D networks as single phases based on the same H-bonded metal complex, respectively. 

The crystallisation of Mn(Cl04)2 6H2O with 2,4-bpe or 4,4 -bpe in absence of NaNCS produces cationic H-bonded metal complexes, bearing as basic building unit a tetraaquocomplex [Mn(bpe)2(OH2)4] (where bpe can be 2,4-bpe or 4,4 -bpe molecule). Each metal complex displays two coordinated bpe in a trans configuration together with four coordinated water molecules around the metal ion. 

In contrast to phospholes, phospholyl anions are all truly aromatic and form Ji-bonded metal complexes (Chapter 8.19). Phospholide anions are very reactive. 

Wang X-Y, Justice R, Sevov SC (2007) Hydrogen-bonded metal-complex sulfonate (MCS) inclusirai compounds effect of the guest molecule on the host framework. Inorg Chem 46 4626-4631. doi 10.1021Ac070324p... 

Expulsion of a moiety separating metal and carbon atoms with resulting metal-carbon bond formation is another method for preparing o-bonded metal complexes. Here again, the name elimination reaction for this process has no mechanistic significance. 

Some papers describe the grafting on polymers containing bond metal complexes on the surface of organic polymers polyethylene-graft-poly(methylvinylketone)/Schiff base with 2-aminophenol 27 [6,37,155] or salicylaldehyde hydrazide [156], polyethylene-graft-poly (vinyl-1,3-diketone) [157], polytetrafluorethylene-graft-poly(acrylate)-complexes with 2,2 -bipyridyl or 1,10-phenanthroline [157]. 

The peculiarity of macrocomplexes topochemistry influences their catalytic properties. As a rule, the extremal dependence of the specific catalytic activity on the surface density of bond metal complexes in all catalytic processes (for example, polymerization, hydrogenation, md oxidation) is observed. However, their kinetic behavior correlates with neither Cjsoi nor Cdust of the complexes. This area too deserves further investigtion. " ... 

Plots of logf i of the metal complexes of a chosen eluent ligand against the surface bonded iminodiacetic acid silica bonded metal complexes were fotmd as useful indicators of which metals may show unusual selectivity changes during the separation process. Iminodiacetic acid is shown in Figure 1.28. 

Polymerization of a Hydrogen-Bonded Metal Complex Ctmtaining Several... 

Fig. 7 A diagram showing the alignment of bpe molecules in the hydrogen-bonded metal complex, 9...

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