Effect of Different Solvent Charcteristics on the Proton-Ligand and Formation Constants of Metal-Ligand Equilibrium of Hydra-Zodimedon in Various Mixed Aqueous Dioxan Solvent*.

Atef A. T. Ramadan and Ali M. Taha

Faculty Of Education, Ain Shams University, Roxy. Cairo, Egypt.

ABSTRACT:

Complex equilibria of 5.5 dimethylcyclohexane-2-(2-hydroxy-phenyl) hydrazono 1,3 dotone (DCPHD) with proton Ni (II) , SM (II) and Yb (III) ion has been measured in various mixed aqueous dioxen solvent viz. 30%, 40%, 50%, 60% and 75% (v/v) dioxen water at 300 C, using pH titremetry. The varration of pKH 1, pKH 2 and log H1 with the inverse of dielectric constant or mole fraction of solvent was studied. The relation between log K 1 for DCPHD-Ln (III) complexes and ioconic potentials (Z2/r) using 50% (v/v) dioxen water was discussed on the basis of the change in solvation properties of the cations. Comparision for log K1 of DCPHD -Ln (III) and dimedon-Ln (III) complexes under similar experimental conditons, reflects the differences in basicity and dentate charcter between DCPHD and dimedon.

KEYWORDS:

Formation; Equilibrium; Hydra-Zodimedon

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Copy the following to cite this article: Ramadan A. A. T, Taha A. M. Effect of Different Solvent Charcteristics on the Proton-Ligand and Formation Constants of Metal-Ligand Equilibrium of Hydra-Zodimedon in Various Mixed Aqueous Dioxan Solvent. Orient J Chem 1988;4(3).

Copy the following to cite this URL: Ramadan A. A. T, Taha A. M. Effect of Different Solvent Charcteristics on the Proton-Ligand and Formation Constants of Metal-Ligand Equilibrium of Hydra-Zodimedon in Various Mixed Aqueous Dioxan Solvent*.. Orient J Chem 1988;4(3). Available from: http://www.orientjchem.org/?p=41967