2,4,6-triaminopyrimidine and its associates with bis(hydroxymethyl) phosphinic acid. State in solution, protolytic, and complexing properties

Protolytic and complexing properties of 2,4,6-triaminopyrimidine and its associates with bis (hydroxymethyl)phosphinic acid in aqueous solution were studied using pH measurements, spectrophotometry (298 K), and mathematical simulation of equilibria (CPESSP software). The stability constants of the associates formed in solution were calculated. It was found that the said associates and the nitrogen base in their composition did not form innner-sphere complexes with typical complexing agents like doubly charged cations of d-elements and lanthanum(III). 2,4,6-Triaminopyrimidine forms an outer-sphere complex with copper(II) ions to affording tetrachlorocuprate(II) with diprotonated 2,4,6-triaminopyrimidine. © 2012 Pleiades Publishing, Ltd

1-[5-(Hydrazidomethylsulfinyl)pentyl]-3,5-dimethylisocyanurate: Protolytic properties and complexation reactions

© 2014 Springer Science+Business Media New York. The compound with antituberculosis activity, 1-[5-(hydrazidomethylsulfinyl)pentyl]-3,5-dimethylisocyanurate, was studied in aqueous dimethyl sulfoxide by potentiometric titration, spectrophotometry, and mathematical simulation of equilibria in solution (the CPESSP program). The protolytic properties of the compound were examined. The compositions and stability constants of its complexes with copper(II) were determined. The geometries of the isocyanurate and its complexes were optimized by molecular mechanics computations

Complexation properties of N-thiophosphorylated thioureas with respect to doubly charged d-metal ions

The acid-base and coordination properties of N-thiophosphorylated thioureas with respect to Ni2+, Co2+, Cd2+, Zn 2+, and Pd2+ ions were studied by UV spectrophotometry in 96% isopropanol. The stability constants pK and the maximum accumulated fractions of complex species in solution were calculated

Acid-base properties of bis(hydrazinocarbonylmethyl) sulfoxide and its complex formation with copper(II) and nickel(II)

Behavior of physiologically active compound, bis(hydrazinocarbonylmethyl) sulfoxide, in aqueous solution has been studied by means of potentiometry, spectrophotometry, and mathematical simulation. Protolytic properties of bis(hydrazinocarbonylmethyl) sulfoxide have been described, and the formation of sodium salt has been confirmed. Composition and stability constants of bis(hydrazinocarbonylmethyl) sulfoxide complexes with copper(II) and nickel(II) have been determined, and the complexes structures have been simulated by molecular mechanics method. © 2014 Pleiades Publishing, Ltd

Coordination properties of N-(Thio)phosphorylated thioureas and thioamides with respect to Co(II), Ni(II), Zn(II), and Cd(II) ions in solution

The acid-base and coordination properties of N-(thio)phosphorylated thioureas and thioamides R1C(X)NHP(Y)R 2 2, where X, Y = S, O (in various combinations); R1 = t-Bu, i-Pr, PhNH, Ph; R2 = (OPr-i), with respect to Co(II), Ni(II), Zn(II), and Cd(II) ions have been studied by pH-metry and UV spectrometry in an organic solvent. The pK values, the stability constants logβ and the maximum accumulated fractions of complex species in the solution have been calculated. © 2007 Pleiades Publishing, Inc

2,4,6-triaminopyrimidine and its associates with bis(hydroxymethyl) phosphinic acid. State in solution, protolytic, and complexing properties

Protolytic and complexing properties of 2,4,6-triaminopyrimidine and its associates with bis (hydroxymethyl)phosphinic acid in aqueous solution were studied using pH measurements, spectrophotometry (298 K), and mathematical simulation of equilibria (CPESSP software). The stability constants of the associates formed in solution were calculated. It was found that the said associates and the nitrogen base in their composition did not form innner-sphere complexes with typical complexing agents like doubly charged cations of d-elements and lanthanum(III). 2,4,6-Triaminopyrimidine forms an outer-sphere complex with copper(II) ions to affording tetrachlorocuprate(II) with diprotonated 2,4,6-triaminopyrimidine. © 2012 Pleiades Publishing, Ltd

2,4,6-triaminopyrimidine and its associates with bis(hydroxymethyl) phosphinic acid. State in solution, protolytic, and complexing properties

Protolytic and complexing properties of 2,4,6-triaminopyrimidine and its associates with bis (hydroxymethyl)phosphinic acid in aqueous solution were studied using pH measurements, spectrophotometry (298 K), and mathematical simulation of equilibria (CPESSP software). The stability constants of the associates formed in solution were calculated. It was found that the said associates and the nitrogen base in their composition did not form innner-sphere complexes with typical complexing agents like doubly charged cations of d-elements and lanthanum(III). 2,4,6-Triaminopyrimidine forms an outer-sphere complex with copper(II) ions to affording tetrachlorocuprate(II) with diprotonated 2,4,6-triaminopyrimidine. © 2012 Pleiades Publishing, Ltd

2,4,6-triaminopyrimidine and its associates with bis(hydroxymethyl) phosphinic acid. State in solution, protolytic, and complexing properties

Protolytic and complexing properties of 2,4,6-triaminopyrimidine and its associates with bis (hydroxymethyl)phosphinic acid in aqueous solution were studied using pH measurements, spectrophotometry (298 K), and mathematical simulation of equilibria (CPESSP software). The stability constants of the associates formed in solution were calculated. It was found that the said associates and the nitrogen base in their composition did not form innner-sphere complexes with typical complexing agents like doubly charged cations of d-elements and lanthanum(III). 2,4,6-Triaminopyrimidine forms an outer-sphere complex with copper(II) ions to affording tetrachlorocuprate(II) with diprotonated 2,4,6-triaminopyrimidine. © 2012 Pleiades Publishing, Ltd

Complexation properties of N-thiophosphorylated thioureas with respect to doubly charged d-metal ions

The acid-base and coordination properties of N-thiophosphorylated thioureas with respect to Ni2+, Co2+, Cd2+, Zn 2+, and Pd2+ ions were studied by UV spectrophotometry in 96% isopropanol. The stability constants pK and the maximum accumulated fractions of complex species in solution were calculated