scholarly journals Kinetics of the Reaction between Ni(tetren)2+and Bipyridine

2012 ◽  
Vol 1 (2) ◽  
pp. 39-45
Author(s):  
Lawrence Hugh Kolopajlo ◽  
Nekuma Korey Hollis ◽  
Ian Pendelton
Keyword(s):  
Aqueous Solution ◽  
Rate Constants ◽  
Substitution Reaction ◽  
Ternary Complex ◽  
Ligand Substitution ◽  
Hydrogen Ion ◽  
Rate Law ◽  
Kinetics Of ◽  
Ligand Substitution Reaction

We report a rate law, rate constants and a mechanism for the ligand substitution reaction between Ni(tetren)2+ and 2, 2'-bipyridine in aqueous solution at 25.0 0C. The rate law is: R = k [Ni(tetren2+)] [bipy]. The data supports a mechanism involving a hydrogen ion assisted pathway in which a ternary complex is not formed.

Ferricyanide Oxidation of Butanol Homogeneously Catalysed by Chlororuthenium Complexes

1979 ◽  
Vol 32 (9) ◽  
pp. 1905 ◽  
Author(s):  
AF Godfrey ◽  
JK Beattie
Keyword(s):  
Aqueous Solution ◽  
Complex Formation ◽  
Linear Dependence ◽  
Rate Constants ◽  
Homogeneous Catalyst ◽  
Basic Solution ◽  
Rate Law ◽  
Kinetics Of ◽  
Solution Estimates ◽  
Butanol Concentration

The oxidation of butan-1-ol by ferricyanide ion in alkaline aqueous solution is catalysed by solutions of ruthenium trichloride hydrate. The kinetics of the reaction has been reinvestigated and the data are consistent with the rate law -d[FeIII]/dt = [Ru](2k1k2 [BuOH] [FeIII])/(2k1 [BuOH]+k2 [FeIII]) This rate law is interpreted by a mechanism involving oxidation of butanol by the catalyst (k1) followed by reoxidation of the catalyst by ferricyanide (k2). The non-linear dependence of the rate on the butanol concentration is ascribed to the rate-determining, butanol-independent reoxidation of the catalyst, rather than to the saturation of complex formation between butanol and the catalyst as previously claimed. Absolute values of the rate constants could not be determined, because some of the ruthenium precipitates from basic solution. With K3RuCl6 as the source of a homogeneous catalyst solution, estimates were obtained at 30�0�C of k1 = 191. mol-1 s-1 and k2 = 1�4 × 103 l. mol-1 s-1.

Ligand substitution reaction on a platinum(ii) complex with bio-relevant thiols: kinetics, mechanism and bioactivity in aqueous medium

RSC Advances ◽  
2014 ◽  
Vol 4 (82) ◽  
pp. 43516-43524 ◽  
Author(s):  
Avradeep Samanta ◽  
Goutam Kr. Ghosh ◽  
Ishani Mitra ◽  
Subhajit Mukherjee ◽  
Jagadeesh C. Bose K ◽  
...  
Keyword(s):  
Ionic Strength ◽  
Aqueous Medium ◽  
Substitution Reaction ◽  
Ligand Substitution ◽  
Constant Ionic Strength ◽  
Kinetics Of ◽  
Ligand Substitution Reaction

Kinetics of the interaction between [Pt(pic)(H2O)2](ClO4)2and selected thiols has been studied in aqueous medium as a function of [complex], [thiol], pH and temperature at constant ionic strength.

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