Protolitic Equilibria and Stability Constants of Mn (II) and Ni (II) Complexes of 3-formylpyridine Thiosemicarbazone in Sodium Dodecyl Sulphate(SDS)-Water Mixture
Journal Title: STAR Journal - Year 2015, Vol 4, Issue 1
Abstract
Protonation constant of nicotinaldehyde thiosemicarbazone (NTSC) and its complexation with Mn (II) and Ni (II) were studied in SDS-water (1.15%w/v) mixture at 303K under nitrogen atmosphere and an ionic strength of 0.1 mol dm-3 pH-potentiometrically. The protonation constant of the ligand and stability constant of its Mn (II) and Ni (II) complexes were calculated by using MINIQUAD 75 computer program, and species distribution diagrams were produced using the HySS computer program. Selection of the best fit chemical models is based on statistical parameters. The predominant species detected for both metals for 1:1 and 1:2 ratios were ML, MLH; ML2, ML2H1 and ML2H2 respectively. The appropriateness of experimental conditions is verified by introducing errors deliberately in the concentrations of ingredients of the solution. Distribution diagram and plausible equilibria for the formation and possible structure of the complex species are also presented.
Authors and Affiliations
Dunkana Negussa Kenie| Department of Chemistry, College of Computational and Natural Sciences, Wollega University, P.O Box: 395, Nekemte, Ethiopia, Satyanarayana A| Department of Physical and Nuclear Chemistry and Chemical Oceanography, Andhra University, Visakhapatnam -530003, India
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- EP ID EP9748
- DOI http://dx.doi.org/10.4314/star.v4i1.11
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