The kinetics of oxidation of [Cr(L)(3)(Cl)(3)]center dot 2H(2)O (L = 2-aminobenzothiazole) by periodate in aqueous media were studied over pH 6.8-8.0, ionic strength 0.10-0.50 mol dm(-3), and temperatures 20-40 degrees C for a range of complex and periodate concentrations. The reaction rate was first-order dependent on both reactants and increased with pH over the range studied. In aqueous media, the complex aquated to [Cr(L)(3)(H2O)(3)](3+). The deprotonated form, [Cr(L)(3)(H2O)(2)center dot(OH)](2+), was regarded as more reactive than its conjugate acid. The effect of Cu(II) and Fe(II) ions on the rate of oxidation was studied over (1.0-5.0) x 10(-4) mol dm(-3). The kinetics data indicate that the rate decreased as concentration of metal ions increased over the range studied. An inner-sphere mechanism is proposed for the oxidation pathways of both protonated and deprotonated Cr-III-complex species.