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Abstract <p>An examination of the kinetics of oxidation of hexamine (HEX), by Diperiodatonickelate(IV) (DPN), was done. This was first carried out using the catalyst ruthenium (III) (Ru(III)) and next without it. In an alkaline medium, this was used as a homogeneous catalyst. It was maintained spectrophotometrically, at a steady ionic strength of 0.8 mol dm<sup>–3</sup>. The reaction exhibited a 1&#xa0;:&#xa0;2 ([HEX] : [DPN]). For [DPN] and [Ru(III)], the order derived was unity. For [HEX] it was less than unity. This was above the concentration range for which the rate increase was done by increasing [OH<sup>–</sup>]. This remained constant in both of the cases. While a change in ionic strength is seen to have a positive effect on the reaction rate constant, upon verification, the dielectric constant is found to have a negative impact. The main product 1,3,5-triazinane-1-carbaldehyde oxime was pinpointed using spot tests and liquid chromatography–mass spectrometry spectral studies. The potential mechanisms were evaluated empirically. The reaction constants used in the various steps of the mechanisms were computed. At various temperatures, the catalytic constant (<i>k</i><sub>C</sub>) was determined for the purpose of Ru(III) catalysis. The activation parameters concerning the catalyst and slow step of the mechanisms were processed, and thermodynamic quantities were then resolved. Kinetic examinations recommend that the novel species of DPN and Ru(III) are found to be [Ni(H<sub>3</sub>IO<sub>6</sub>)<sub>2</sub>(OH)<sub>2</sub>]<sup>2–</sup> and [Ru(H<sub>2</sub>O)<sub>5</sub>OH]<sup>2+</sup>, respectively.</p>

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Spectrophotometric Approach for the Oxidation of Hexamine through Diperiodatonickelate(IV) Using Ruthenium(III) Chloride and Potassium Hydroxide for a Mechanistic Investigation

  • 期刊论文

  • 发表日期：

    2026年3月1日

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  • M. K. Thriveni,
  • B. Thippeswamy,
  • T. Shivalingaswamy,
  • I. Mallikarjuna

摘要

Abstract

An examination of the kinetics of oxidation of hexamine (HEX), by Diperiodatonickelate(IV) (DPN), was done. This was first carried out using the catalyst ruthenium (III) (Ru(III)) and next without it. In an alkaline medium, this was used as a homogeneous catalyst. It was maintained spectrophotometrically, at a steady ionic strength of 0.8 mol dm–3. The reaction exhibited a 1 : 2 ([HEX] : [DPN]). For [DPN] and [Ru(III)], the order derived was unity. For [HEX] it was less than unity. This was above the concentration range for which the rate increase was done by increasing [OH–]. This remained constant in both of the cases. While a change in ionic strength is seen to have a positive effect on the reaction rate constant, upon verification, the dielectric constant is found to have a negative impact. The main product 1,3,5-triazinane-1-carbaldehyde oxime was pinpointed using spot tests and liquid chromatography–mass spectrometry spectral studies. The potential mechanisms were evaluated empirically. The reaction constants used in the various steps of the mechanisms were computed. At various temperatures, the catalytic constant (kC) was determined for the purpose of Ru(III) catalysis. The activation parameters concerning the catalyst and slow step of the mechanisms were processed, and thermodynamic quantities were then resolved. Kinetic examinations recommend that the novel species of DPN and Ru(III) are found to be [Ni(H3IO6)2(OH)2]2– and [Ru(H2O)5OH]2+, respectively.