Mixed ligand complexes of copper with amino-acids and tartrate using differential pulse polarography. Part I

Killa, H. M.; Mabrouk, Elhoussine; Ghoneim, Mohammed M.

doi:10.1007/bf03325417

Cited by 4 publications

(2 citation statements)

References 15 publications

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“…In Figure 4, copper(i1) complexation in tartrate-isoleucinate mixtures of a constant ionic strength (1 mol/L) is illustrated [16]. It is obvious that the significant R values are connected with much lower isoleucinate concentrations than those that are applied.…”

Section: Concentration Range Of the Stronger Ligandmentioning

confidence: 96%

Optimum conditions for polarographic studies of mixed‐ligand complex formation

Zelić

1995

Electroanalysis

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Some characteristics of bi-ligand systems, important for the design and performance of studies on mixed-ligand complex formation, are given. The problem of the optimum ligand concentration is discussed using published results. In the experimental work the concentration range of the stronger complexant (at a constant level of the weaker) seems to be critical. The measurements should start under conditions where the increase in the half-wave potential shift (with respect to the situation in the presence of only the weaker ligand) is virtually absent and finish at concentrations where it is pronounced. Small changes at the beginning reflect the 'contribution' of ternary species to the composite signal, whereas the big shifts at higher concentrations are mainly produced by simple species with only a minor contribution from mixed-ligand complexes.

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Section: Concentration Range Of the Stronger Ligandmentioning

confidence: 96%

Optimum conditions for polarographic studies of mixed‐ligand complex formation

Zelić

1995

Electroanalysis

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“…In addition, the study includes the measurement of vibrational spectra and equivalent conductance at infinite dilution (Λº), association constant (K A ) at 298K using mixed solvent 50% (v\v) (diethylformamide-water) (Hosny and El-Dossoki, 2008). In differential pulse polarographic study, the complexes of Cu (II) with mixed ligands composed of amino acids (therionine, valine, isolyosine) with tartarate were prepared, the formation constantans and equilibrium constants were also calculated for these complexes (Killa et al,1992). The study of Cd (II) with Vit.C (ascorbic acid) with amino acids (Serine and L-Lysine) and other complexes were prepared and measured by voltametric technique at pH 7.3 at two temperatures (25 and 37ºC) and molar percent 1:1:1,1:1:2,1:2:1.…”

Section: ‫ــــــــــــــــــــــــــــــــــــــــــــــــــــ‬ Intromentioning

confidence: 99%

Conductometric Studies for Association Reaction of some Amino Acid Complexes in Water

Al-Allaf¹,

Al-Tamer²,

Abdulfattah³

2013

RJS

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Molar conductivities of dilute solutions for the complexes: Co(II)(alanine + valine), Ni(II)(valine + serine), Ca(II)(alanine + serine), Mg(II)(valine + serine) in water were measured in the temperature range from (293.16-313.16K). The ionic molar conductivity (Λ), the association constant (K A), distance parameter (R), and (σΛ) at best fit values were determined by treating experimental data with Lee-Wheaton conductivity equation. Thermodynamic quantities for the ion association reaction were derived from the temperature dependence of K A. The obtained results provide information on ion-ion and ion-solvent interactions.

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