Effect of water-acetone solvent on the stability of copper(II) and nickel(II) nicotinamide complexes

Исаева, В. А.; Gesse, Zh. F.; Шарнин, В. А.

doi:10.1134/s1070328406050034

Cited by 6 publications

(5 citation statements)

References 3 publications

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“…The obtained values are listed in Table 1 together with the literature data for comparison. A good agreement with earlier published data for both ligands is obtained [24,26,27], considering the differences in ionic strength and ionic medium. The pK N-py values correspond to a proton dissociation from nitrogen atom of the pyridine ring of both ligands and pK COOH to the dissociation of a proton from the carboxylic group of nicotinic acid.…”

Section: Potentiometric Measurementssupporting

confidence: 89%

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Interaction of niacin with nickel(II) ions

Urbańska¹,

Podsiadły²

2009

Journal of Electroanalytical Chemistry

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Section: Potentiometric Measurementssupporting

confidence: 89%

“…A small number of potentiometric studies on estimation the formation constants of these complexes in the solution has been found [23][24][25][26][27].…”

Section: Nicotinamide (Ana)mentioning

confidence: 99%

Interaction of niacin with nickel(II) ions

Urbańska¹,

Podsiadły²

2009

Journal of Electroanalytical Chemistry

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“…The study of 3‐pyridinecarboxamide (nicotinamide, NicNH 2 ) and its complexes with d ‐metal ions is of great interest because of their biological activity . The thermodynamic functions of nicotinamide complex formation with Cu 2+ , Ag + , Ni 2+ , and Fe 3+ ions in several binary solvents were determined in recent works …”

Section: Introductionmentioning

confidence: 99%

“…[1] The thermodynamic functions of nicotinamide complex formation with Cu 2+ , Ag + , Ni 2+ , and Fe 3+ ions in several binary solvents were determined in recent works. [2][3][4][5][6] A nicotinamide molecule is known to form 1 : 1 coordination compounds donating a lone electron pair of nitrogen heteroatom towards a cation. [7,8] The nitrogen heteroatom can be an acceptor of the only hydrogen bond when nicotinamide is dissolved in a protonic solvent.…”

Section: Introductionmentioning

confidence: 99%

Stability of H‐complexes of nicotinamide nitrogen heteroatom with water and ethanol in mixed solvents by ¹³C NMR probing

Шарнин

Aleksandriysky

Dushina

et al. 2013

Magnetic Reson in Chemistry

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The formation constants of the nicotinamide H-complexes with protonic solvents such as water and ethanol in aqueous dimethyl sulfoxide and aqueous ethanol were determined using (13)C NMR data. Free Gibbs energy of nicotinamide donor center (nitrogen heteroatom) solvation was calculated. Gibbs energy of entire nicotinamide molecule solvation was shown to be antibate towards Gibbs energy of a pyridine nitrogen solvation. The solvation state of this molecule fragment must be taken into consideration when analyzing the reagents contributions in the thermodynamics of complexation.

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“…Potentiometric titrations of copper(II) in aqueous media were applied [6][7][8][9][10] . In these case get a one end-point only.…”

mentioning

confidence: 99%

Automatic Biamperometric Titration of Copper(II) by Iodide in Some Non-Aqueous Media

Ramadan¹,

Mandil²,

Ghazal³

2013

Asian J. Chem.

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The amperometric detection with two polarized indicating electrodes (also named as biamperometic detection) is based on the measurement and the intensity of current passing through the two identical, usually inert, electrodes, to which a small potential difference from few tens to few hundreds milli volts was applied. The current flowing in the detection cell is observed only, when solution contacting the electrodes contains two forms of reversible redox couple, it means such one for which at the same potential the oxidation of the reduced form or the reduction of oxidized form can occur. This behaviour is observed for such couples as Br 2 /Br-; I 2 /I-; Fe 3+ / Fe 2+ ; Ce 4+ /Ce 3+ ; Ag + /Ag; AgI/Ag, I-; AgBr/Ag, Br-; AgCl/ Ag,Cl-; quinine/hydroquinine; Cu 2+ /Cu + (in some nonaqueous media), etc. 1-3. In biamperometric detection, in the presence of an excess of one form of reversible redox couple, the magnitude of the current measured is linearly proportional to the concentration of the second form in the solution as long as concentration over potential is not involved. When the polarizing potential difference applied to the electrodes is increased, an extension of the linear range of response is observed, however, it is associated with possible interference for other redox species present in solution. When the system detected in the solution is irreversible, the oxidation and reduction processes have activation potentials much larger, even up to 1 V. Such a large

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Effect of water-acetone solvent on the stability of copper(II) and nickel(II) nicotinamide complexes

Cited by 6 publications

References 3 publications

Interaction of niacin with nickel(II) ions

Interaction of niacin with nickel(II) ions

Stability of H‐complexes of nicotinamide nitrogen heteroatom with water and ethanol in mixed solvents by ¹³C NMR probing

Automatic Biamperometric Titration of Copper(II) by Iodide in Some Non-Aqueous Media

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Effect of water-acetone solvent on the stability of copper(II) and nickel(II) nicotinamide complexes

Cited by 6 publications

References 3 publications

Interaction of niacin with nickel(II) ions

Interaction of niacin with nickel(II) ions

Stability of H‐complexes of nicotinamide nitrogen heteroatom with water and ethanol in mixed solvents by 13C NMR probing

Automatic Biamperometric Titration of Copper(II) by Iodide in Some Non-Aqueous Media

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Stability of H‐complexes of nicotinamide nitrogen heteroatom with water and ethanol in mixed solvents by ¹³C NMR probing