Spectrophotometric determination of the formation constants of Calcium(II) complexes with 1,2-ethylenediamine, 1,3-propanediamine and 1,4-butanediamine in acetonitrile

González, Jacqueline González; Nájera-Lara, Mónica; López-Ramírez, Varinia; Ramírez-Vázquez, Juan Antonio; Segoviano-Garfias, José J. N.

doi:10.1016/j.gee.2017.01.002

Cited by 3 publications

(1 citation statement)

References 28 publications

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“…During the displacement process at the time of metal complex formation, some ions disappear and form a bonding between metal ions and ligands. It may be considered due to displacement of a proton from a ligand species or ions or molecules causing a drop in the pH values of the solution [2]. Irving and Rossotti developed a technique for the calculation of stability constant, and it is called potentiometric technique.…”

Section: Introductionmentioning

confidence: 99%

Stability Constants of Metal Complexes in Solution

Singh¹,

Srivastav²,

Singh³

et al. 2020

Stability and Applications of Coordination Compounds

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In the formation of metal complexes in an aqueous medium, equilibrium constant or stability constant is used to determine the strength of interaction between reagents that make the final product after the formation of bonds. In general stability means that a complex may be stored for a long time under suitable conditions or this compound may be existing under suitable conditions. Regarding how much is the concentration of complexes in solution, stability constant provides this information via calculations. These calculations are very much important in many areas of science like chemistry, biology, and medicine. During the complex formation in aqueous medium, two types of stabilities are considered: one is the thermodynamic stability, and the other is kinetic stability. Stability of metal complexes may be affected by various factors like nature of central metal ion and ligand, chelating effect, etc., and some parameters like distribution coefficients, conductance, refractive index, etc. are useful for the determination of stability constants. Various modern techniques are used to determine the stability constant of simple as well as mixed ligand compounds.

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Section: Introductionmentioning

confidence: 99%

Stability Constants of Metal Complexes in Solution

Singh¹,

Srivastav²,

Singh³

et al. 2020

Stability and Applications of Coordination Compounds

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Excess properties, spectral analyses and computational chemistry of the binary mixture of polyethylene glycol 200 + 1,3-propanediamine

Yan

et al. 2022

Journal of Molecular Liquids

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Solution Equilibria Formation of Manganese(II) Complexes with Ethylenediamine, 1,3-Propanediamine and 1,4-ButanediaMine in Methanol

Segoviano-Garfias¹,

Zanor²,

Ávila-Ramos³

2022

Molbank

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Manganese is an abundant element that plays critical roles and is at the reaction center of several enzymes. In order to promote an understanding of the behavior of manganese(II) ion with several aliphatic ligands, in this work, the stability and spectral behavior of the complexes with manganese(II) and ethylenediamine, 1,3-propanediamine or 1,4-butanediamine were explored. A spectrophotometric study of its speciation in methanol was performed at 293 K. The formation constants obtained for these systems were: manganese(II)-ethylenediamine log β110 = 3.98 and log β120 = 7.51; for the manganese(II)-1,3-propanediamine log β110 = 5.08 and log β120 = 8.66; and for manganese(II)-1,4-butanediamine log β110 = 4.36 and log β120 = 8.46. These results were obtained by fitting the experimental spectrophotometric data using the HypSpec software. The complexes reported in this study show a spectral pattern that could be related to a chelate effect in which the molar absorbance is not directly related to the increase in the carbon chain of the ligands.

show abstract

Spectrophotometric determination of the formation constants of Calcium(II) complexes with 1,2-ethylenediamine, 1,3-propanediamine and 1,4-butanediamine in acetonitrile

Cited by 3 publications

References 28 publications

Stability Constants of Metal Complexes in Solution

Stability Constants of Metal Complexes in Solution

Excess properties, spectral analyses and computational chemistry of the binary mixture of polyethylene glycol 200 + 1,3-propanediamine

Solution Equilibria Formation of Manganese(II) Complexes with Ethylenediamine, 1,3-Propanediamine and 1,4-ButanediaMine in Methanol

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