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Transition Metal Chemistry

, 17:430 | Cite as

Kinetic studies on the dissociation of triethylenetetramine complexes of nickel(II) and copper(II) in aqueous acid media

  • Trishna Pramanik
  • Debabrata Banerjea
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Summary

From stopped-flow spectrophotometric studies on the kinetics of dissociation of [M(trien)]2+ (M=CuII, NiII) to M aq 2+ and trien H 4 4+ in aqueous acid medium, it has been established that the reaction occurs in a complex manner conforming to the relation
$$k_{obs} = k_o + k'_H [H^ + ] + k''_H [H^ + ]^2 $$
At 250 C, I=0.1 mol dm−3 the values of the constants are ko (s−1)=1.2(Ni), 3.0(Cu); k′H (dm3 mol−1 s−1)=37 (Ni), 257 (Cu); k″H (dm6 mol−2 s−1)=0 (Ni), 83,300 (Cu). The enthalpy and entropy of activation for the reactions have been evaluated and a plausible reaction scheme is proposed and discussed.

Keywords

Acidic Aqueous Solution Bidentate Ligand Transition Meet Tetramine Graphical Evaluation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1992

Authors and Affiliations

  • Trishna Pramanik
    • 1
  • Debabrata Banerjea
    • 1
  1. 1.Inorganic Chemistry Division, Department of ChemistryUniversity College of ScienceCalcuttaIndia

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