Chemical Speciation of Mixed-Ligand Complexes of Co(II), Ni(II) and Cu(II) with MSA and L-Dopa in Acetonitrile -Water Mixtures
PILLI LAKSHMI KISHORE
, V TEJESWARA RAO , Prof. G. NAGESWARA RAO
Mercaprosuccinic acid, Ternary Complexes, Acetonitrile, Speciation
A computer assisted pH-metric investigation has been carried out on the speciation of complexes of Co(II), Ni(II) and Cu(II) with MSA and L-Dopa. The titrations were performed in the presence of different relative concentrations (M:L:X = 1.0:2.5:2.5; 1.0:2.5:3.75; 1.0:3.75:2.5) of metal (M) to MSA (L) to L-Dopa (X) with sodium hydroxide in varying concentrations (0–60% v/v) of acetonitrile–water mixtures at an ionic strength of 0.16 mol L-1 and at a temperature of 303.0 K. Stability constants of the ternary complexes were refined using MINIQUAD75. The species MLX, MLX2, MLX2H and MLXH2 for Co(II), Ni(II) and Cu(II) were detected. Influence of the solvent on the speciation was discussed based on the dielectric constant of the medium. The stabilities of the mixed ligand complexes are discussed in terms of the molecular structure of MSA and L-Dopa as well as the nature of the metal ion. The species distribution with pH at different compositions of acetonitrile–water mixtures and plausible equilibria for the formation of species were also presented. The bioavailability of the metal ions is explained based on the speciation.
"Chemical Speciation of Mixed-Ligand Complexes of Co(II), Ni(II) and Cu(II) with MSA and L-Dopa in Acetonitrile -Water Mixtures", IJSDR - International Journal of Scientific Development and Research (www.IJSDR.org), ISSN:2455-2631, Vol.4, Issue 8, page no.50 - 61, August-2019, Available :https://ijsdr.org/papers/IJSDR1908009.pdf
Volume 4
Issue 8,
August-2019
Pages : 50 - 61
Paper Reg. ID: IJSDR_190881
Published Paper Id: IJSDR1908009
Downloads: 000347234
Research Area: Chemistry
Country: VISAKHAPATNAM, ANDHRA PRADESH, India
ISSN: 2455-2631 | IMPACT FACTOR: 9.15 Calculated By Google Scholar | ESTD YEAR: 2016
An International Scholarly Open Access Journal, Peer-Reviewed, Refereed Journal Impact Factor 9.15 Calculate by Google Scholar and Semantic Scholar | AI-Powered Research Tool, Multidisciplinary, Monthly, Multilanguage Journal Indexing in All Major Database & Metadata, Citation Generator
Publisher: IJSDR(IJ Publication) Janvi Wave
