Chemical speciation of some divalent transition metal ion complexes of L-ornithine in low dielectric media
| Main Authors: | Hadgu Hailekiros Belay, Budati Bala Venkata Sailaja, Gollapalli Nageswara Rao |
|---|---|
| Format: | Article Journal |
| Bahasa: | eng |
| Terbitan: |
, 2016
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/5607068 |
Daftar Isi:
- Department of Inorganic and Analytical Chemistry, Andhra University, Visakhapatnam-530 003, Andhra Pradesh, India E-mail : gollapallinr@yahoo.com Manuscript received online 20 June 2015, accepted 25 August 2015 The stability constants binary complexes of CoII, NiII and CuII with L-ornithine in 0–60% v/v dioxan-water mixtures were determined pH-metrically at 303 K and at an ionic strength of 0.16 mol L–1. The existence of various binary complexes was established from modeling studies using computer program MINIQUAD75. The best fit chemical models containing ML, ML2, MLH and ML2H2 species were arrived at based on statistical parameters. The trend in the variation of stability constants with the medium composition was explained on the basis of changes in the dielectric constant of the solution. Effect of errors in concentrations of the ingredients on stability constants was also studied. Chemical speciation is discussed based on the distribution diagrams, drawn using HYSS HYPERQUAD.