2005
DOI: 10.1002/kin.20077
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Kinetics and mechanism of ligand exchange of coordinated cyanide in hexacyanoferrate(II) by nitroso‐R‐salt in the presence of mercury(II) as a catalyst

Abstract: The kinetics of Hg(II)-catalyzed reaction between hexacyanoferrate(II) and nitroso-R-salt has been followed spectrophotometrically by monitoring the increase in absorbance at 720 nm, the λ max of green complex, [Fe(CN) 5 N-R-salt] 3− as a function of pH, ionic strength, temperature, concentration of reactants, and the catalyst. In this reaction, the coordinated cyanide ion in hexacyanoferrate(II) gets replaced by incoming N-R-salt under the following specified reaction conditions: temperature = 25 ± 0.1 • C, … Show more

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Cited by 13 publications
(29 citation statements)
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“…The overall rate of reaction due to catalyzed and uncatalyzed reactions in the presence of a non-rate-limiting concentration of [PhNHNH 2 ] can 6 ] 4− by Nmethylpyrazinium iodide [20], nitroso-R-salt [21], and pyrazine [22]. Although the value of k 2 was evaluated at high [Fe(CN) 4− 6 ], yet it was found to be valid at lower concentration as well.…”
Section: Effect Of Temperature and Ionic Strength On Initial Ratesmentioning
confidence: 93%
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“…The overall rate of reaction due to catalyzed and uncatalyzed reactions in the presence of a non-rate-limiting concentration of [PhNHNH 2 ] can 6 ] 4− by Nmethylpyrazinium iodide [20], nitroso-R-salt [21], and pyrazine [22]. Although the value of k 2 was evaluated at high [Fe(CN) 4− 6 ], yet it was found to be valid at lower concentration as well.…”
Section: Effect Of Temperature and Ionic Strength On Initial Ratesmentioning
confidence: 93%
“…The 6 ], in a manner similar to the action of ultraviolet light [20][21][22] [24]. AgCN is almost insoluble in water, whereas Ag(CN) − 2 is highly soluble and has a high stability constant [25] (K = 7.0 × 10 19 ).…”
Section: H 2 O]mentioning
confidence: 99%
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“…The reaction obeyed Eyring's equation, and was found to proceed at a reasonable rate at 30 ºC, and was therefore selected for subsequent studies. The effect of ionic strength (μ) on the rate of the catalyzed reaction was studied in a range of 0.01 to 0.2 M, adjusted using KNO 3 …”
Section: Effects Of Reagent Concentration Temperature and Ionic Strementioning
confidence: 99%
“…Numerous kinetic studies relate to the kinetics and mechanisms of metal-catalyzed ligand-substitution reactions between hexacyanoferrate(II) and nitrogen heterocyclic ligands [1][2][3][4]. The kinetic determination of ultra trace quantities of inorganic ions have been the subject of interest of several investigators [5][6][7][8][9][10][11][12][13][14] including our group [15][16][17][18].…”
Section: Introductionmentioning
confidence: 99%