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Kinetics and Mechanism of Palladium(II)-Catalyzed Oxidation of Inositol by Hexachloroplatinate(IV) in Perchlorate Solutions

Received: 29 August 2016     Accepted: 8 September 2016     Published: 24 September 2016
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Abstract

Oxidation of inositol (INOS) by hexachloroplatinate(IV) complex (HCP) in perchlorate solutions in the presence of palladium(II) catalyst was studied spectrophotometrically. The reaction rate was very slow in the absence of the catalyst. The reaction exhibited a first order dependence on [HCP], and fractional-first order dependences with respect to [INOS], [H+] and [Pd(II)]. Increasing ionic strength and dielectric constant was found to increase the oxidation rate. A probable oxidation mechanism has been suggested and the rate-law expression has been derived. Both spectral and kinetic evidences revealed formation of a 1:1 intermediate complex between INOS and Pd(II) prior to the rate-controlling step. The final oxidation product of inositol was identified by both spectral and chemical analyses as the corresponding monoketone derivative, namely inosose. The activation parameters of the second order rate constant were evaluated and discussed.

Published in American Journal of Applied Chemistry (Volume 4, Issue 5)
DOI 10.11648/j.ajac.20160405.15
Page(s) 185-191
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This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2016. Published by Science Publishing Group

Keywords

Inositol, Hexachloroplatinate(IV), Oxidation, Palladium(II), Kinetics, Mechanism

References
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    Ahmed Fawzy, Ishaq A. Zaafarany, Khalid S. Khairou, Sheigha S. Ashour, Naeema Yarkandi. (2016). Kinetics and Mechanism of Palladium(II)-Catalyzed Oxidation of Inositol by Hexachloroplatinate(IV) in Perchlorate Solutions. American Journal of Applied Chemistry, 4(5), 185-191. https://doi.org/10.11648/j.ajac.20160405.15

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    ACS Style

    Ahmed Fawzy; Ishaq A. Zaafarany; Khalid S. Khairou; Sheigha S. Ashour; Naeema Yarkandi. Kinetics and Mechanism of Palladium(II)-Catalyzed Oxidation of Inositol by Hexachloroplatinate(IV) in Perchlorate Solutions. Am. J. Appl. Chem. 2016, 4(5), 185-191. doi: 10.11648/j.ajac.20160405.15

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    AMA Style

    Ahmed Fawzy, Ishaq A. Zaafarany, Khalid S. Khairou, Sheigha S. Ashour, Naeema Yarkandi. Kinetics and Mechanism of Palladium(II)-Catalyzed Oxidation of Inositol by Hexachloroplatinate(IV) in Perchlorate Solutions. Am J Appl Chem. 2016;4(5):185-191. doi: 10.11648/j.ajac.20160405.15

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  • @article{10.11648/j.ajac.20160405.15,
      author = {Ahmed Fawzy and Ishaq A. Zaafarany and Khalid S. Khairou and Sheigha S. Ashour and Naeema Yarkandi},
      title = {Kinetics and Mechanism of Palladium(II)-Catalyzed Oxidation of Inositol by Hexachloroplatinate(IV) in Perchlorate Solutions},
      journal = {American Journal of Applied Chemistry},
      volume = {4},
      number = {5},
      pages = {185-191},
      doi = {10.11648/j.ajac.20160405.15},
      url = {https://doi.org/10.11648/j.ajac.20160405.15},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajac.20160405.15},
      abstract = {Oxidation of inositol (INOS) by hexachloroplatinate(IV) complex (HCP) in perchlorate solutions in the presence of palladium(II) catalyst was studied spectrophotometrically. The reaction rate was very slow in the absence of the catalyst. The reaction exhibited a first order dependence on [HCP], and fractional-first order dependences with respect to [INOS], [H+] and [Pd(II)]. Increasing ionic strength and dielectric constant was found to increase the oxidation rate. A probable oxidation mechanism has been suggested and the rate-law expression has been derived. Both spectral and kinetic evidences revealed formation of a 1:1 intermediate complex between INOS and Pd(II) prior to the rate-controlling step. The final oxidation product of inositol was identified by both spectral and chemical analyses as the corresponding monoketone derivative, namely inosose. The activation parameters of the second order rate constant were evaluated and discussed.},
     year = {2016}
    }
    

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  • TY  - JOUR
    T1  - Kinetics and Mechanism of Palladium(II)-Catalyzed Oxidation of Inositol by Hexachloroplatinate(IV) in Perchlorate Solutions
    AU  - Ahmed Fawzy
    AU  - Ishaq A. Zaafarany
    AU  - Khalid S. Khairou
    AU  - Sheigha S. Ashour
    AU  - Naeema Yarkandi
    Y1  - 2016/09/24
    PY  - 2016
    N1  - https://doi.org/10.11648/j.ajac.20160405.15
    DO  - 10.11648/j.ajac.20160405.15
    T2  - American Journal of Applied Chemistry
    JF  - American Journal of Applied Chemistry
    JO  - American Journal of Applied Chemistry
    SP  - 185
    EP  - 191
    PB  - Science Publishing Group
    SN  - 2330-8745
    UR  - https://doi.org/10.11648/j.ajac.20160405.15
    AB  - Oxidation of inositol (INOS) by hexachloroplatinate(IV) complex (HCP) in perchlorate solutions in the presence of palladium(II) catalyst was studied spectrophotometrically. The reaction rate was very slow in the absence of the catalyst. The reaction exhibited a first order dependence on [HCP], and fractional-first order dependences with respect to [INOS], [H+] and [Pd(II)]. Increasing ionic strength and dielectric constant was found to increase the oxidation rate. A probable oxidation mechanism has been suggested and the rate-law expression has been derived. Both spectral and kinetic evidences revealed formation of a 1:1 intermediate complex between INOS and Pd(II) prior to the rate-controlling step. The final oxidation product of inositol was identified by both spectral and chemical analyses as the corresponding monoketone derivative, namely inosose. The activation parameters of the second order rate constant were evaluated and discussed.
    VL  - 4
    IS  - 5
    ER  - 

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Author Information
  • Chemistry Department, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia

  • Chemistry Department, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia

  • Chemistry Department, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia

  • Chemistry Department, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia

  • Chemistry Department, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia

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