Kinetics and mechanism of the oxidation ofbis(2,4,6-tripyridyl-1,3,5-triazine)iron(II) bytrans-1,2-diaminocyclohexanetetraacetatomanganate(III) in acetate buffer |
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| Authors: | Tatakuntla Satyanarayana Nageswara Rao Anipindi Veeraputhiran Subbiah Madhusudan Waman Pandit |
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| Affiliation: | 1. School of Chemistry, Andhra University, 530003, Visakhapatnam, India
2. Centre for Cellular and Molecular Biology, 500007, Hyderabad, India
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| Abstract: | The rapid oxidation ofbis(2,4,6-tripyridyl-1,3,5-triazine)-iron(II), [Fe(TPTZ)2]2+, bytrans-1,2-diaminocyclohexanetetraacetatomanganate(III), [MnIII(Y)]−, in acetate buffers was monitored using stopped-flow spectrophotometry. The reaction is first order in the substrate and evidence was obtained for pre-complexation between the oxidant and the substrate. The reaction rate increases as the pH increases. Characterisation of the products using the radiotracers54Mn and59Fe indicated that [MnII(Y)]2− and [Fe(TPTZ)2]3+ are the final products. The reaction obeys the rate law:
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![$$k_{obs} = frac{{k_3 K_2 [Mn^{III} (Y)^ - ]_t }}{{{ 1 + K_1 [H^ + ] + K_2 [Mn^{III} (Y)^ - ]_t } }}$$](/content/201673T3662Q6432/11243_2008_Article_BF02910900_TeX2GIFE1.gif)