Hypochlorite Oxidation of a Chromium(III) Schiff Base Complex
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R. Rajan
Abstract
Hypochlorite oxidation of the Schiff base complex of chromium(IIl), Cr(salen)(H20)2 has been investigated at pH 9.0 to understand the mechanism of formation of oxochromium(V) species, which has been implicated in the apoptotic cell death brought about by Cr(salen)(H2)O2 . The reaction exhibited a two stage kinetic profile due to the formation of oxochromium( V) species and its subsequent decay. The final product has been unambiguously identified as Chromate. The overall stoichiometry of lfCr(III)]: 1.5[OCl ] has been established for the reaction. The thermodynamic parameters for the formation of oxochromium( V) species are ΔΗ 9.9 ± 1.8 Kcal mol 1 and ΔS 24.5 ± 8.0 e.u. Reaction schemes have been proposed invoking Cr(V) and Cr(IV) dimeric species as possible intermediates. An inner sphere mechanism has been invoked in the formation of oxochromium( V) intermediate.
© 2014 by Walter de Gruyter Berlin/Boston
Artikel in diesem Heft
- Hypochlorite Oxidation of a Chromium(III) Schiff Base Complex
- Theoretical Estimates of Association Constants for Contact Triple-Ion Formation
- Inner Sphere Reduction of Tris(pyridine-2- carboxylato)manganese(III) by Hydroxylammonium Ion in Sodium Picolinate-Picolinic Acid Buffer Media
- The Complex Aqueous Chemistry of RUC12(TPPTS)3 and its Reaction with Dihydrogen
- Substitution Reactions of Platinum(II) Dipicolinate Complex with Some Mono- and Bidentate Ligands - Rates and Mechanism
- Kinetics and Mechanism of Oxidation of Azide Ion by 12-Tungstocobaltate(III), [CoW12O40]5-, Ion
- Osmium(VIII) Catalysed Oxidation of Thiocyanate by Periodate in Aqueous Alkaline Medium
- Kinetics and Mechanism of the Reactions of Bis(biguanide)copper(II) Ion with Different Amino Acids in Aqueous Media
- Keywords: Kinetics, copper(II), biguanide, amino acids, associative mechanism
- Aquation and Base Hydrolysis of trans-Tetraammine(methylamine)sulfatocobalt(III) Complex Ion
- Notes for Contributors. Inorganic Reaction Mechanisms
- Instructions for Authors
- Disk Specifications
Artikel in diesem Heft
- Hypochlorite Oxidation of a Chromium(III) Schiff Base Complex
- Theoretical Estimates of Association Constants for Contact Triple-Ion Formation
- Inner Sphere Reduction of Tris(pyridine-2- carboxylato)manganese(III) by Hydroxylammonium Ion in Sodium Picolinate-Picolinic Acid Buffer Media
- The Complex Aqueous Chemistry of RUC12(TPPTS)3 and its Reaction with Dihydrogen
- Substitution Reactions of Platinum(II) Dipicolinate Complex with Some Mono- and Bidentate Ligands - Rates and Mechanism
- Kinetics and Mechanism of Oxidation of Azide Ion by 12-Tungstocobaltate(III), [CoW12O40]5-, Ion
- Osmium(VIII) Catalysed Oxidation of Thiocyanate by Periodate in Aqueous Alkaline Medium
- Kinetics and Mechanism of the Reactions of Bis(biguanide)copper(II) Ion with Different Amino Acids in Aqueous Media
- Keywords: Kinetics, copper(II), biguanide, amino acids, associative mechanism
- Aquation and Base Hydrolysis of trans-Tetraammine(methylamine)sulfatocobalt(III) Complex Ion
- Notes for Contributors. Inorganic Reaction Mechanisms
- Instructions for Authors
- Disk Specifications
