Kinetic Salt Effects in Concentrated Solutions of Supporting Electrolyte. The Reaction between the Bromopentaamminecobalt(III) and Hydroxyl Ions<sup>1</sup>

Perlmutter-Hayman, Berta; Weissmann, Yael

doi:10.1021/j100793a036

Cited by 15 publications

(1 citation statement)

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“…Therefore an investigation of kinetic and mechanism of substitution reactions is still an important topic of coordination chemistry. Between many factors influencing the substitution rate a specific kinetic salt effect has been studied only for limited systems [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Kinetics of anation of hexaaquachromium(III) by thiocyanates – specific salt effects

Chatłas

2005

Transition Met Chem

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The kinetics of anation of hexaaquachromium(III) by thiocyanates follows the rate law:The specific salt effect has been studied for five media: NaCl, NaBr, NaClO 4 , KCl and CsCl. The series of chloride (Na + , K + and Cs + ) salts show a negligible effect on the anation rate. On the contrary, the series of sodium salts (Cl ) , Br ) and ClO 4 ) ) reveal a marked difference in the reaction rate. The anation rate decreases sharply with the ionic strength increase (I ¼ 0.2-2.0 M, NaCl). The results were interpreted within the frame of fast equilibria of ion-pair formation followed by an interchange mechanism step. The difference of reaction rate is a result of competition between anions (thiocyanates and supporting electrolyte anions) to the complex cation at an ion-pair formation process.

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Section: Introductionmentioning

confidence: 99%

Kinetics of anation of hexaaquachromium(III) by thiocyanates – specific salt effects

Chatłas

2005

Transition Met Chem

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Kinetic Salt Effects and the Specific Influence of Ions on Rate Constants

Pethybridge¹,

Prue²

1972

Progress in Inorganic Chemistry

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The Influence of Supporting Electrolytes on Ionic Equilibria. The Hydrolysis of the Dichromate Ion

Perlmutter-Hayman¹,

Weissmann²

1968

Israel Journal of Chemistry

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The influence of supporting electrolytes on the equilibrium has been investigated with a view to comparing this influence with that exerted on the rate s of reactions of similar charge-types. Neither the influence on the equilibrium constant nor that on the rate constant of the back reaction was fonnd to be uniquely determined by the principle of ionic strength. These results, together with examples from the literature, show that there seems to be nothing special about environmental influence on the kin e tic s of reactions. It is suggested that what makes prediction difficult is the fact that in both cases activity coefficients appear in a combination which is different from that encountered in the mean activity coeffic tent, A spectrophotometric method is employed. The value of the equilibrium constant at zero ionic strength has been found equal to 4,4 x 10-2 ; the heat of reaction is 3.8 Kcal mol-I. The discrepancies between these values and those reported in the literature are discussed.

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Kinetic Salt Effects in Concentrated Solutions of Supporting Electrolyte. The Reaction between the Bromopentaamminecobalt(III) and Hydroxyl Ions¹

Cited by 15 publications

References 2 publications

Kinetics of anation of hexaaquachromium(III) by thiocyanates – specific salt effects

Kinetics of anation of hexaaquachromium(III) by thiocyanates – specific salt effects

Kinetic Salt Effects and the Specific Influence of Ions on Rate Constants

The Influence of Supporting Electrolytes on Ionic Equilibria. The Hydrolysis of the Dichromate Ion

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Kinetic Salt Effects in Concentrated Solutions of Supporting Electrolyte. The Reaction between the Bromopentaamminecobalt(III) and Hydroxyl Ions1

Cited by 15 publications

References 2 publications

Kinetics of anation of hexaaquachromium(III) by thiocyanates – specific salt effects

Kinetics of anation of hexaaquachromium(III) by thiocyanates – specific salt effects

Kinetic Salt Effects and the Specific Influence of Ions on Rate Constants

The Influence of Supporting Electrolytes on Ionic Equilibria. The Hydrolysis of the Dichromate Ion

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Product

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Kinetic Salt Effects in Concentrated Solutions of Supporting Electrolyte. The Reaction between the Bromopentaamminecobalt(III) and Hydroxyl Ions¹