Interactions of the axial ligand with its blue copper center are known to be important in tuning spectroscopic and redox properties of cupredoxins. While conversion of the blue copper center with a weak axial ligand to a green copper center containing a medium strength axial ligand has been demonstrated in cupredoxins, converting the blue copper center to a red copper center with a strong axial...

A series of RuII complexes stabilized with the pentapyridyl ligand Py5Me2 (Py5Me2 = 2,6-bis(1,1-bis(2-pyridyl)ethyl)pyridine) and with an axial X ligand (X = Cl-, H2O, N3-, MeCN) were prepared and characterized in the solid state and in non-aqueous solution. The cyclic voltammograms of these complexes in MeCN reflect a reversible substitution of the axial X ligand with MeCN. Irreversible ligand...

a series of new heteroleptic chelated copper(ii) complexes that encompass n,n-dibezyl substituted derivative of ethylenediamine (x-diamine) and acetylacetonate (acac) were prepared.  the ir and electronic absorption spectra and the molar conductivity of the complexes are presented and discussed.  the molar conductivity values of the complexes in different solvents reveals a predominance of elec...

Because of their unusual spectral and catalytic properties, the cytochrome P-4.50 enzymes have been intensely investigated [ 11. A major objective has been to identify the non-porphyrin ligand(s) to the central iron in states l-5 of the P-450 reaction cycle (see Scheme 1). Comparative physical properties of synthetic porphyrin complexes with various axial ligands, myoglobin complexes with axial...

An Al(porphyrin) functionalized with a large axial ligand was incorporated into a porous organic polymer (POP) using a cobalt-catalyzed acetylene trimerization strategy. Removal of the axial ligand afforded a microporous POP that is catalytically active in the methanolysis of a nerve agent simulant. Supercritical CO2 processing of the POP dramatically increased the pore size and volume, allowin...

The catalytic activity of high-valent iron-oxo active species of heme enzymes is known to be dependent on the nature of the axial ligand trans to the iron-oxo group. In a similar fashion, experimental studies on iron-oxo porphyrin biomimetic systems have shown a significant axial ligand effect on ethylbenzene hydroxylation, with an axial acetonitrile ligand leading to phenyl hydroxylation produ...

The axial-ligand properties of [Pd(NH3)4]2+ and [Pt(NH3)4]2+ in aqueous solution have been assessed via quantum mechanical charge field molecular dynamics. Due to the similar distance between axial ligands second solvation shell, an angular-radial distribution analysis has performed. result highlight how character solvent influences interaction ion respective influence on experimentally observe...