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Mixed-Ligand Complexation of Zinc and Cobalt(II) Complexonates with Amino Acids in an Aqueous Solution

The formation of mixed-ligand complexes in the M(II)–Nta and Ida–L systems (M = Co, Zn; L = His, Orn, Lys, Gly, Im, en), where Ida and Nta are the residues of iminodiacetic and nitrilotriacetic acids, was studied by pH-metry, calorimetry, and NMR spectroscopy. The thermodynamic parameters (log K , Δ...

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Published in:Russian journal of inorganic chemistry 2018-02, Vol.63 (2), p.180-190
Main Authors: Pyreu, D. F., Alekseeva, E. S., Simagina, T. A., Gruzdev, M. S., Kumeev, R. S., Gridchin, S. N.
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description The formation of mixed-ligand complexes in the M(II)–Nta and Ida–L systems (M = Co, Zn; L = His, Orn, Lys, Gly, Im, en), where Ida and Nta are the residues of iminodiacetic and nitrilotriacetic acids, was studied by pH-metry, calorimetry, and NMR spectroscopy. The thermodynamic parameters (log K , Δ r G 0 , Δ r H , Δ r S ) of formation for these complexes were determined at 298.15 K and an ionic strength I = 0.5 (KNO3). The most probable pattern of coordination between a complexone and an amino acid in mixed-ligand complexes was revealed.
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subjects Amino acids
Chemistry
Chemistry and Materials Science
Coordination Compounds
Inorganic Chemistry
Ligands
NMR
NMR spectroscopy
Nuclear magnetic resonance
Zinc
title Mixed-Ligand Complexation of Zinc and Cobalt(II) Complexonates with Amino Acids in an Aqueous Solution
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