The complexation kinetics between Ni(II) with d-2,2-(ethylenediimino)-di-1-butanol has been investigated at 25, 30, 35 and 40 ± 0.05 °C in the pH range 6.18-7.41 using Aminco Morrow stopped flow spectrophotometer. The ionic strength was maintained at 0.1 M KNO3. The anionic form of d-2,2-(ethylenediimino)-di-1-butanol is more reactive and the protonated form interacts only to a small extent. Kinetic results indicate that the ligand is not involved in the rate determining step which is, in fact, associated with the release of a water molecule from the shell of the metal ions prior to complexation with the ligand. Enthalpy, entropy of activation, energy of the molecule and heat of formation were also calculated. A mechanism consistent with the kinetic data has been suggested.
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