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Vol. 31 No. 6 (2019): Vol 31 Issue 6

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Mononuclear Binary Complex Formation Equilibria of L-Ornithine with Biologically Essential Metals in TBAB Micellar Media

https://doi.org/10.14233/ajchem.2019.21979
A.G. Atnafu
Department of Inorganic and Analytical Chemistry, Andhra University, Visakhapatnam-530003, India
R. Srinivasu
Department of Physical and Nuclear Chemistry and Chemical Oceanography, Andhra University, Visakhapatnam-530003, India
P. Shyamala
Department of Physical and Nuclear Chemistry and Chemical Oceanography, Andhra University, Visakhapatnam-530003, India
G. Nageswara Rao
Department of Inorganic and Analytical Chemistry, Andhra University, Visakhapatnam-530003, India

Corresponding Author(s) : G. Nageswara Rao

gollapallinr@yahoo.com

Asian Journal of Chemistry, Vol. 31 No. 6 (2019): Vol 31 Issue 6

Abstract

Investigation of mononuclear complex of L-ornithine in tetrabutylammonium bromide (TBAB, a cationinc surfactant) micelle media has been made pH metrically at constant temperature and ionic strength in different percentage of micellar solutions (0.0-2.5 %). Stability constants and best fit model for metal complexes were obtained by MINIQUAD75 computer program on the basis of the analysis of residues and other statistical parameters. Accordingly, ML, ML2, MLH and ML2H for both Co(II) and Cu(II) and ML2 and ML2H for Ni(II) mononuclear chemical models were obtained. The stabilization/destabilization equilibria of the binary system for the model species with percentage composition of micelles at constant ionic strength and temperature could be attributed to dielectric constant and other intrinsic interaction properties of tetrabutylammonium bromide micelle with ligands and metal ions. The plot of percentage of species against pH values has been generated from SIM refined data using origin85 software.

Keywords

Complex equilibria Metal ions L-Ornithine TBAB MINIQUAD75
Atnafu, A., Srinivasu, R., Shyamala, P., & Rao, G. N. (2019). Mononuclear Binary Complex Formation Equilibria of L-Ornithine with Biologically Essential Metals in TBAB Micellar Media. Asian Journal of Chemistry, 31(6), 1383–1388. https://doi.org/10.14233/ajchem.2019.21979
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