Der Pharma Chemica
Journal for Medicinal Chemistry, Pharmaceutical Chemistry, Pharmaceutical Sciences and Computational Chemistry
ISSN: 0975-413X
Abstract
Impact of Dielectric Constant on Binary Complexes of Ca(II), Zn(II) and Mn(II) Ions with L-proline
Author(s): Boddu Veeraswami, Gollapalli Nageswara RaoBinary complexes of Ca(II), Zn(II) and Mn(II) with L-proline was investigated pH-metrically in 1,2-propanediol-water mixtures by maintaining an ionic strength of 0.16 mol.L-1 at 303.0 K. The best-fit chemical models for present study are ML+, MLH2+ and ML2H+ for Ca(II), Zn(II) and Mn(II) ions are established from modelling studies using computer program MINIQUAD75. Some errors influence the magnitudes of stability constants and its order is alkali > acid > ligand > metal. The graphical representation of log β against 1/D of the medium shows that dominance of electrostatic interactions. Distribution diagrams of the various species of the binary complexes in relation to pH at different variations (0.0-60.0% v/v) of propylene glycol-water mixtures were presented.
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