Polyaminocarboxylate complexes

The Ru(IV)/Ru(III) redox potential is 0.78 V, so that Ru(III) or even Ru(II) species may be present in vivo. Indeed, the related Ru(III) complex 32 is also active (171), and the pendant arms in these octahedral polyaminocarboxylate complexes increase the rate of substitution reactions. Complex 32 binds rapidly to the blood proteins albumin and transferrin (172), and the ruthenium ion appears to remain in the... 

Rush JD, Koppenol WH (1987) The reaction between ferrous polyaminocarboxylate complexes and hydrogen peroxide an investigation of the reaction intermediates by stopped flow spectrophotometry. J Inorg Biochem 29 199-215... 

Tetradentate Polyaminocarboxylate Complexes As the following examples indicate, stereospecific formation of metal complexes with chiral tetradentate polyaminocarboxylate ligands do not always lead to the same absolute structures as that of the corresponding complexes with achiral ligands.171... 

Stability constants for several other polyaminocarboxylate complexes of TKI) have also been determined. 

Fluorescence kinetic measurements were applied to the determination of hydration numbers in lanthanide-polyaminocarboxylate complexes the results are given in table 5 (Brittain et al. 1991, Brittain and Jasinski 1988). Measurements of hydration numbers as a function of the solution pH for Eu " and Tb " complexes showed the presence of three buffer regions the first one at low pH in which the hydration number of the cations is equivalent to that of the free ions the second one in the pH range of 4-8 in which complexation decreases the hydration numbers and the third one at high pH (ca. 9-12) being associated with the formation of ternary hydroxo complexes. 

Magnetic-susceptibility measurements of polyaminocarboxylate complexes agreed with a model of predominantly ionic interactions (Moeller and Horwitz 1959). Additional evidence for the ionic nature of the bonding in the f-element complexes is found in the linear correlation of the log of the stability constant for complexation, log of... 

To ensure that the stability of the complex is comparable to aheady reported polyaminocarboxylates complexes, it is possible to perform a competitive luminescence... 

A general rate law has been established for the exchange of cerium(m) with several of its polyaminocarboxylate complexes, over a range of pH s. Rates of exchange of cobalt(n) with its bisbenzenediamine complexes have been investigated. In formamide solution, the rate constant at 35 °C is 1.0 x 10 ... 

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