Study of Complex Formation between N-Phenylaza-15-Crown-5 with Mg2+, Ca2+, Ag+ and Cd2+ Metal Cations in Some Binary Mixed Aqueous and Non-aqueous Solvents using the Conductometric Method

Rounaghi, Gholam Hossein; Khoshnood, Razieh Sanavi; Zavvar, Mohammad Hossein Arbab

doi:10.1007/s10847-005-8380-7

Cited by 31 publications

(4 citation statements)

References 17 publications

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“…This evidence reflects that changes might be occurring in the structure of the solvent mixtures 20 and these changes probably alter solvations of the metal ion, the Schiff base and even the resulting complex as well as the preferential solvation of these species in the mixed solvents. 44 Preferential solvation of ions by one of the components of a mixed solvent system depends on two factors: the relative donor-acceptor abilities of the component molecules towards the ion and the interactions between solvent molecules themselves. The solvating properties of the components in mixed solvents can even be significantly modified by solvent-solvent interactions when the energy of the latter is comparable with the energy difference of ion-solvent interactions for both of the components.…”

Section: Conductometric Titrationmentioning

confidence: 99%

Thermodynamics of the complexation between salicylaldehyde thiosemicarbazone with Cu2+ ion in methanol +1,4-dioxane binary solutions

Biswas

Brahman

Sinha

2014

JSCS

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The complexation reaction between salicylaldehyde thiosemicarbazone, abbreviated as STSC, with Cu(II) ion was studied in binary mixtures of methanol-1,4-dioxane using UV-Vis spectrophotometric and conductometric methods at different temperatures. The formation constants (K f ) for the 1:1 complex, Cu(II)-STSC, were calculated from computer fitting of the absorbance and molar conductance data against various concentrations ratios (c M :c L or c L :c M ) in different binary solvent mixtures. A non-linear correlation was observed for the variation of log K f for the complex against the solvent compositions. Various thermodynamic parameters (ΔH, ΔS and ΔG) for the formation of the Cu(II)-STSC complex were also determined from the temperature dependence of the formation constants (K f ). The results showed that the complexation reaction is affected by the nature and composition of the mixed solvents.

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Section: Conductometric Titrationmentioning

confidence: 99%

Thermodynamics of the complexation between salicylaldehyde thiosemicarbazone with Cu2+ ion in methanol +1,4-dioxane binary solutions

Biswas

Brahman

Sinha

2014

JSCS

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“…It is possibly due to the changes happened in solvation characteristics of the ionophore, cation and even the resulting complex as the composition of the medium varied, which caused the change in the interactions of the solvents with the solutes [17]. …”

Section: Discussionmentioning

confidence: 99%

Thermodynamic Study of the Complexation of p-Isopropylcalix[6]arene with Cs+ Cation in Dimethylsulfoxide-Acetonitrile Binary Media

et al. 2011

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The complexation reactions between the macrocyclic ionophore, p-isopropylcalix[6]arene and Cs+ cation were studied in dimethylsulfoxide–acetonitrile (DMSO-AN) binary non-aqueous solvents at different temperatures using a conductometry method. The conductance data show that the stoichiometry of the (p-isopropylcalix[6]-arene·Cs)+ complex in all binary mixed solvents is 1:1. The stability of the complexes is affected by the composition of the binary solvent media and a non-linear behavior was observed for changes of log Kf of the complex versus the composition of the binary mixed solvents. The thermodynamic parameters (ΔH°c and ΔS°c) for formation of (p-isopropyl-calix[6]arene·Cs)+ complex were obtained from temperature dependence of the stability constant and the obtained results show that the (p-isopropylcalix[6]arene·Cs)+ complex is enthalpy destabilized, but entropy stabilized, and the values of the mentioned parameters are affected strongly by the nature and composition of the binary mixed solvents.

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“…Such changes caused changes in the interactions of the solvents with the solutes. 39 It is well known that preferential solvation of ions in mixed solvent systems depends on two factors: the relative donor-acceptor abilities of the component molecules towards the ion and the interactions between solvent molecules themselves. The solvating properties of the components in mixed solvents can even be significantly modified by solvent-solvent interactions when the energy of the latter is comparable with the energy difference of solvent-ion interactions for both components.…”

Section: Stability Of the Complexmentioning

confidence: 99%

Spectrophotometric and conductometric study of the complexation of N-salicylidene-2-aminophenol with Cu2+ in methanol + 1,4-dioxane binary solutions

Biswas

Brahman

Sinha

2014

JSCS

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The complexation reaction between N-salicylidene-2-aminophenol, abbreviated as SAP, with Cu2+ ion was studied in binary mixtures of methanol and 1,4-dioxane by using conductometric and spectrophotometric method at different temperatures. The stability constants (Kf) for the 1:1 complex, Cu2+-SAP, were calculated from computer fitting of absorbance and molar conductance data against various mole ratios (cM:cL or cL:cM) in different binary solvent mixtures. A non-linear behaviour was observed for the variation of logKf for the complex against the solvent compositions. Various thermodynamic parameters (?H, ?S and ?G) for the formation of Cu2+-SAP complex were determined from the temperature dependence of stability constants (Kf). The overall results showed that the complexation reaction is entropy driven and is affected by the nature and composition of the mixed solvents.

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Study of Complex Formation between N-Phenylaza-15-Crown-5 with Mg2+, Ca2+, Ag+ and Cd2+ Metal Cations in Some Binary Mixed Aqueous and Non-aqueous Solvents using the Conductometric Method

Cited by 31 publications

References 17 publications

Thermodynamics of the complexation between salicylaldehyde thiosemicarbazone with Cu2+ ion in methanol +1,4-dioxane binary solutions

Thermodynamics of the complexation between salicylaldehyde thiosemicarbazone with Cu2+ ion in methanol +1,4-dioxane binary solutions

Thermodynamic Study of the Complexation of p-Isopropylcalix[6]arene with Cs+ Cation in Dimethylsulfoxide-Acetonitrile Binary Media

Spectrophotometric and conductometric study of the complexation of N-salicylidene-2-aminophenol with Cu2+ in methanol + 1,4-dioxane binary solutions

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