Thermodynamics of complex formation of Ag(I).

Marco, Domenico De; Mauceri, Gabriella; Marchese, Antonino; Bellomo, Athos

doi:10.1016/0040-6031(86)85271-6

Cited by 14 publications

(10 citation statements)

References 14 publications

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“…Forcing the convergence of the model by incorporating Ag(S 2 O 3 )(NH 3 ) 2gave an order higher objective function (sum of variances ) 5-150) with no significant difference in the derived stability constant value. This indicates a poor fit of the literature model, 8 with the experimental data in the present study at I ) 0.1 M.…”

Section: Ag(i) -S 2 Ocontrasting

confidence: 76%

“…It has been reported that the formation of both Ag(S 2 O 3 )-(NH 3 )and Ag(S 2 O 3 )(NH 3 ) 2with log β 111 ) 9.88 and log β 112 ) 13.0 at I ) 1.0 KNO 3 , 25 °C, occurs in ammoniacal silver thiosulfate solutions in a study of the three ligand system NH 3 , S 2 O 3 2-, and SCN -. 8 However, a good fit of the potentiometric data in this study could be accomplished by using a model containing just the single complex species Ag(S 2 O 3 )(NH 3 ) -(Figure 1). Forcing the convergence of the model by incorporating Ag(S 2 O 3 )(NH 3 ) 2gave an order higher objective function (sum of variances ) 5-150) with no significant difference in the derived stability constant value.…”

Section: Ag(i) -S 2 Omentioning

confidence: 99%

“…In the ammoniacal silver(I) system, two mixed complexes, AgS 2 -O 3 NH 3and AgS 2 O 3 (NH 3 ) 2 -, have been reported in a mixed ligand system which contained NH 3 , S 2 O 3 2-, and SCN -. 8 As for gold(I), only some studies adverting to this system could be found. 9 The high stability of the di-thiosulfato complex 10 and the instability of free Au + ions with respect to disproportionation 11 (3Au(I) f 2Au(0) + Au(III)) make it difficult to conduct suitable experiments.…”

Section: Introductionmentioning

confidence: 99%

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The Ammine, Thiosulfato, and Mixed Ammine/Thiosulfato Complexes of Silver(I) and Gold(I)

Perera

Senanayake

2004

Inorg. Chem.

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The M(I)-NH(3), M(I)-S(2)O(3)(2)(-), and M(I)-S(2)O(3)(2)(-)-NH(3) systems (M = Ag, Au) were studied at 25 degrees C and at I = 0.1 M (NaClO(4)) using a variety of analytical techniques. For the Ag(I)-NH(3)-S(2)O(3)(2)(-) system, AgS(2)O(3)NH(3)(-) was detected with formation constant log beta(111) (for the reaction Ag(+) + S(2)O(3)(2)(-) + NH(3) <--> AgS(2)O(3)NH(3)(-)) of 11.2, 10.4, and 10.8 on the basis of silver potentiometry, UV-vis spectrophotometry, and hydrodynamic voltammetry, respectively. Also, the values of log beta(101)(AgNH(3)(+)), log beta(102)(Ag(NH(3))(2)(+)), log beta(110)(AgS(2)O(3)(-)), and log beta(120)(Ag(S(2)O(3))(2)(3)(-)), obtained from silver potentiometry, were 3.59, 7.0, 8.97, 13.1, respectively. In the case of the ammine complexes, the log beta(101)(AgNH(3)(+)) and log beta(102)(Ag(NH(3))(2)(+)) values were found to be 3.5 and 7.1, respectively, from the UV-vis spectrophotometric experiments. The mixed species AuS(2)O(3)NH(3)(-) was detected in UV-vis spectrophotometric, hydrodynamic voltammetric, and potentiometric experiments with the stepwise formation constants (log K(111)) of -4.0, -3.5, -3.8, respectively, for the reaction Au(S(2)O(3))(2)(3)(-) + NH(3) <--> AuS(2)O(3)NH(3)(-) + S(2)O(3)(2)(-). At higher [NH(3)]/[S(2)O(3)(2)(-)] ratios (>10(5)), the formation of Au(NH(3))(2)(+) was also detected in spectrophotometric and potentiometric experiments with stepwise formation constants (log K(102)) of -5.4 and -5.3, respectively, according to the reaction AuS(2)O(3)NH(3)(-) + NH(3) <--> Au(NH(3))(2)(+) + S(2)O(3)(2)(-).

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Section: Ag(i) -S 2 Ocontrasting

confidence: 76%

Section: Ag(i) -S 2 Omentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Ammine, Thiosulfato, and Mixed Ammine/Thiosulfato Complexes of Silver(I) and Gold(I)

Perera

Senanayake

2004

Inorg. Chem.

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“…The phenomenon occurs in the series analyzed in the present work, in the series of complexing reaction of Ag(I), (14)(15)(16) of Hg(II) (13) and in several series of complexing reactions with rare earth metal ions. (10,11) It can be concluded that, in the successive stepwise complex formation, the system gains and loses stiffness in an alternating way corresponding to the alternating release of the solvent molecules from the coordination spheres of the reactants.…”

Section: Discussionmentioning

confidence: 95%

“….). Because closely spread equilibrium isotherms are experimentally observed both for different series of reactions in the same solvent (8,(10)(11)(12)(13) or for the same series of reactions in different but similar solvents (water, methanol, ethanol) (14)(15)(16) it can be concluded that in the cases investigated the values of τ are mainly determined by the nature and the role of the solvent medium. (iv) The solvent molecules involved in the complex formation reactions appear to be the main factor that determines the relative position of the reactions in the respective trend.…”

Section: Discussionmentioning

confidence: 95%

Thermodynamic relationships in complex formation. IX. ΔH – ΔS and free energy relationships in mixed ligand complex formation reactions of Cd(II) in aqueous solution

Marco

Linert

2002

The Journal of Chemical Thermodynamics

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Komplexbildung zwischen Silber(I) und Pyrimidinderivaten

Schmidt

Dietze

Hoyer

et al. 1990

Zeitschrift fuer Chemie

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Als Hauptprodukt der Umsetzung von 1 mit SOCl, bildet sich S,N,; dilneben lie13 sich aus dem Reaktionsgemisch eine kleine Menge von Trischwefel-distickstoff-dioxid VerDie mitReuktion zwischen 1 und SOCI,: Zu einer auf -75°C gekiihlten Losung von 2,090 g 1 (7,OO mmol) in 10 ml CH,CI, wurden 0,856 g SOCI, (7,20 mmol) getropft und die erhaltene Reaktionsmischung auf Raumtemperatur erwarmt. Nach 12 11 wurde das ausgeschiedene S,N, (0,466 g-2,52 mmol) abfiltriert und das Filtrat abgcdampft. Der Ruckstand (0,936 g), der noch S,N, enthielt, wurde im Soxhletgerat mit n-Pentan extrahiert, und die aus dem Extrakt erhaltenen grungelben Kristalle wurden aus 100 ml n-Pentan umkristallisiert. Ausbeute: 0,48 g (3,08 mmol) S3N2O2; Elementaranalyse (in yo) ber. f~r S,N,O,/gef.: S: 61,6/60,9; N: 17,9/18,1.Reaktion zwischen 1 und SnCl,: a ) Zu der auf -75°C gekiihlten Losung von 1,994 g 1 (G,G8 mmol) in 20 ml CH,Cl, wurden 1,735 g SnCI, (6,M mmol) zugetropft. Nach Erwarmen auf 20°C wurde das Reaktionsgemisch 2 h geruhrt, der abgeschiedene Niederschlsg abfiltriert und zweimal mit 15 ml CH,Cl, gewaschen. Ausbeute: b) Zu der auf -75°C gekuhlten Losung von 3,805 g 1 (12,7 mmol) in 25 ml CH,Cl, wurden 3,360 g SnC1, (12,9 mmol) zugegegen. Nach 12 h Ruhren bei Raumtemperatur wurde der Niederschlag, der nach Aussage des IR-Spektrums auch 5 enthielt, mit insgessmt 350 ml CH,Cl, gewaschen. Ausbeute: 0,999 g (1,59 mmol)

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Thermodynamics of complex formation of Ag(I).

Cited by 14 publications

References 14 publications

The Ammine, Thiosulfato, and Mixed Ammine/Thiosulfato Complexes of Silver(I) and Gold(I)

The Ammine, Thiosulfato, and Mixed Ammine/Thiosulfato Complexes of Silver(I) and Gold(I)

Thermodynamic relationships in complex formation. IX. ΔH – ΔS and free energy relationships in mixed ligand complex formation reactions of Cd(II) in aqueous solution

Komplexbildung zwischen Silber(I) und Pyrimidinderivaten

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