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Article
Hydrate-Anion Complex of Proton [H(H2O)n]+А− as the Basis of the Complex Acidity Function Н0w of Aqueous Solutions of Strong Mineral Acids in Excess of Water
Based on the concept of the proton hydrate-anion complex [H(H2O)n]+A−, equations are proposed that characterize the catalytic activity of the proton in aqueous solutions of three acids: sulfuric, hydrochloric, an...
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Article
Mixed Ligand Zinc Complexation with Ornithine and Histidine in Aqueous Solution
The formation of mixed-ligand complexes of various compositions in the Zn–L-histidine (His)–L-ornithine (Orn) system has been studied by pH-metry, calorimetry, and NMR spectroscopy. The thermodynamic parameter...
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Article
Thermodynamics of the Formation of Mixed Complexes of Nickel(II) Ions with Histidine and Diamines in an Aqueous Solution
Calorimetry, spectrophotometry, and pH measurements are used to study the formation of mixed ligand complexes with 1,10-phenanthroline (Phen) and ethylenediamine (En) in Ni(II)–His–Phen(En) systems. The format...
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Article
Thermodynamics of Mixed-Ligand Nickel(II) Complex Formation with Ornithine and Histidine in Aqueous Solutions
The formation of various mixed-ligand complexes in the Ni(II)–L-histidine (His)–L-ornithine (Orn) system was studied by potentiometric titration, calorimetry, and spectrophotometry. The thermodynamic parameter...
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Article
Formation of Mixed-Ligand Complexes of Mercury(II) with Mono- and Diamine Complexone Ligands in Aqueous Solution
The formation of mixed ligand complexes in HgEdta2−–L systems (L = Asp2−, Glu2−, Ida2−, Nta3−, and Edta4−) is studied via calorimetry, pH-metry, and NMR spectroscopy. The thermodynamic parameters (log K, ΔrG°, Δr
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Article
Formation of Mixed-Ligand Complexes of Metals(II) with Monoamine Complexones and Amino Acids in Solution
The formation of mixed-ligand complexes in the M(II)–Nta, Ida–L (M = Cu(II), Ni, Zn, Co(II), L = Ser, Thr, Asp, Arg, Asn) systems, where Ida and Nta are the residues of iminodiacetic and nitrilotriacetic acids...
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Article
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 stud...
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Article
Complex formation of mercury(II) chloride with dipeptides
Mixed-ligand complex formation in the HgCl–L systems (L= GlyGly, AlaAla) has been studied by pH potentiometry, calorimetry, and 1Н and 13С NMR spectroscopy in aqueous solutions at 298.15 K and ionic strengths I o...
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Article
Thermochemical study of the complex formation of copper(II) and nickel(II) iminodiacetates with amino acids in aqueous solutions
The formation of mixed-ligand complexes in the M(II)–Ida–L systems (M = Cu, Ni, L = His, Orn, Lys), where Ida is the iminodiacetic acid residue, was studied by pH-metry, calorimetry, and spectrophotometry. The...
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Article
Thermodynamic characteristics of the acid-base equilibria of taurine in aqueous solutions, according to calorimetry data
Enthalpies of the neutralization and protonation of taurine (HL) are measured by direct calorimetry at 298.15 K and ionic strengths of 0.3, 0.5, and 1.0 (KNO3). The standard thermodynamic characteristics of HL pr...
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Article
Enthalpies and constants of dissociation for D,L-Alanyl-D,L-Serine at 298 K
Protolytic equilibria in aqueous solutions of D,L-alanyl-D,L-serine are studied by means of potentiometry and calorimetry. The dissociation constants and thermal effects of this reaction of the dipeptide are d...
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Article
Thermodynamics of mixed-ligand complex formation of copper(II) ethylenediaminetetraacetate with amino acids in solution
The mixed-ligand complex formation in the systems Cu2+–Edta4−–L (L = His, Lys, Orn, Arg, Im) has been calorimetrically, pH-potentiometrically, and spectrophotometrically studied in aqueous solution at 298.15 K an...
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Article
Thermodynamics of mixed-ligand complexation of yttrium group lanthanide ethylenediaminetetraacetates
Mixed-ligand complexation of yttrium subgroup lanthanide ethylenediaminetetraacetates with asparaginate, iminodiacetate, and nitrilotriacetate ions in aqueous solution was studied by calorimetry and pH-metry. ...
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Article
Mixed complex formation of lead(II) and mercury(II) ethylenediaminetetraacetates with thiourea in an aqueous solution
The formation of mixed-ligand complexes HgEdtaThio2−, HgEdtaS2O 3 4− , PbEdtaThio2−, and Pb(Thio) i ...
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Article
Thermodynamic characteristics of protolytic equilibria of hexamethylenediamine-N,N,N′,N′-tetraacetic acid
The heats of dissociation of betaine groups of hexamethylenediamine-N,N,N′,N′-tetraacetic acid (H4L) at 298.15 K and the ionic strengths of 0.1, 0.5, and 1.0 (KNO3) were determined by direct calorimetry. The stan...
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Article
The thermodynamic functions of formation and transfer of copper(II) and nickel(II) ethylenediaminetetraacetate complexes with ammonia in aqueous-ethanolic solutions
The formation of mixed-ligand NiEdtaNH 3 2− and CuEdtaNH 3 2− complexes in an aqueous-ethanolic solvent wi...
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Article
The enthalpies and dissociation constants of L-homoserine in aqueous solutions of KNO3
Acid-base interactions in solutions of L-homoserine were studied potentiometrically and calorimetrically. The constants and heat effects of the step dissociation of the amino acid at 298.15 K and ionic strengt...
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Article
Thermodynamics of mixed-ligand complexation of cerium group lanthanide ethylenediaminetetraacetates
The thermodynamic parameters (logK, Δ r G 0, Δ r H, and Δ ...
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Article
Thermodynamics of mixed-ligand complexation of mercury(II) ethylenediaminetetraacetate with histidine and lysine in aqueous solution
The formation of mixed-ligand complexes HgEdtaIm2−, HgEdtaL3−, HgEdtaHL2−, and (HgEdta)2L5− (L is histidine, lysine; Im is imidazole) was studied by calorimetry, pH-metry, and NMR spectroscopy. The thermodynamic ...
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Article
Thermodynamics of heteroligand mercury(II) complexes with nitrilotriacetic acid and ethylenediamine in aqueous solution
Formation of heteroligand complexes HgNtaEn− and Hg(Nta)2En4−, where Nta3− is nitrilotriacetate ion and En is ethylenediamine, was studied by means of direct calorimetry, potentiometry, and NMR spectroscopy at 29...
