Speciation of ternary complexes of CoII, NiII and CuII with L-proline and L-valine in 1,2-propanediol-water mixtures
| Main Authors: | Peketi Bhushanavathi, Boddu Veeraswami, Gollapalli Nageswara Rao |
|---|---|
| Format: | Article Journal |
| Bahasa: | eng |
| Terbitan: |
, 2014
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/5588463 |
Daftar Isi:
- St. Joseph’s College for Women (A), Visakhapatnam-530 004, Andhra Pradesh, India Gitam Institute of Technology, Gitam University, Visakhapatnam-530 045, Andhra Pradesh, India School of Chemistry, Andhra University, Visakhapatnam-530 003, Andhra Pradesh, India E-mail : gollapallinr@yahoo.com Manuscript received online 25 February 2013, revised 17 March 2013, accepted 22 March 2013 A computer assisted investigation was made pH metrically on the speciation of ternary complexes of CoII, NiII and CuII in 0.0–60.0% v/v 1,2-propanediol-water mixtures with L-proline (A) as primary ligand and L-valine (B) as secondary ligand at an ionic strength of 0.16 mol L–1 and 303.0 K. The stability constants were refined using computer program MINIQUAD75. The ternary species confirmed were MAB, MABH+, MABH22+ for CoII, NiII and CuII. The stability constants increased linearly with decreasing dielectric constant of the medium due to dominance of electrostatic forces of the cosolvent. The species distribution with pH and speculative structures of the species were also presented.