Kinetics and Mechanistic Study of Oxidation of Pyridine Derivative by Cerium(IV) in Aqueous Perchloric Acid

Ahmed Fawzy; Ishaq A. Zaafarany; Fahd A. Tirkistani; Ameena Al-Bonayan; Faten A. Aljiffrey

doi:doi:10.11648/j.ajpc.20160501.12

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Kinetics and Mechanistic Study of Oxidation of Pyridine Derivative by Cerium(IV) in Aqueous Perchloric Acid

Ahmed Fawzy, Ishaq A. Zaafarany, Fahd A. Tirkistani, Ameena Al-Bonayan, Faten A. Aljiffrey

Published in American Journal of Physical Chemistry (Volume 5, Issue 1)

Received: 15 January 2016 Accepted: 23 January 2016 Published: 4 February 2016

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Abstract

The kinetics of oxidation of N, N-dimethyl-N’-(pyridin-2-yl) formamidine (Py-F) by cerium(IV) was studied spectrophotometrically in aqueous perchloric acid solutions at a constant ionic strength of 1.0 mol dm^-3 and at 20°C. The reaction showed first order dependence with respect to [Ce(IV)] and less than unit order with respect to [Py-F]. The reaction exhibited negative fractional-first order kinetics with respect to [H⁺]. The rate of reaction was not significantly affected by variation of either ionic strength or dielectric constant of the reaction medium. Addition of cerium(III) product did not affect the reaction rate. A suitable mechanistic scheme for the oxidation reaction has been proposed. The final oxidation products were identified as 2-aminopyridine, dimethylamine and carbon dioxide. The activation parameters have been evaluated and discussed. The rate law associated with the reaction mechanism was derived.

Published in	American Journal of Physical Chemistry (Volume 5, Issue 1)
DOI	10.11648/j.ajpc.20160501.12
Page(s)	10-16
Creative Commons	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

Kinetics, Mechanism, Oxidation, Pyridine Derivative, Cerium(IV)

References

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APA Style

Ahmed Fawzy, Ishaq A. Zaafarany, Fahd A. Tirkistani, Ameena Al-Bonayan, Faten A. Aljiffrey. (2016). Kinetics and Mechanistic Study of Oxidation of Pyridine Derivative by Cerium(IV) in Aqueous Perchloric Acid. American Journal of Physical Chemistry, 5(1), 10-16. https://doi.org/10.11648/j.ajpc.20160501.12

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ACS Style

Ahmed Fawzy; Ishaq A. Zaafarany; Fahd A. Tirkistani; Ameena Al-Bonayan; Faten A. Aljiffrey. Kinetics and Mechanistic Study of Oxidation of Pyridine Derivative by Cerium(IV) in Aqueous Perchloric Acid. Am. J. Phys. Chem. 2016, 5(1), 10-16. doi: 10.11648/j.ajpc.20160501.12

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AMA Style

Ahmed Fawzy, Ishaq A. Zaafarany, Fahd A. Tirkistani, Ameena Al-Bonayan, Faten A. Aljiffrey. Kinetics and Mechanistic Study of Oxidation of Pyridine Derivative by Cerium(IV) in Aqueous Perchloric Acid. Am J Phys Chem. 2016;5(1):10-16. doi: 10.11648/j.ajpc.20160501.12

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@article{10.11648/j.ajpc.20160501.12,
  author = {Ahmed Fawzy and Ishaq A. Zaafarany and Fahd A. Tirkistani and Ameena Al-Bonayan and Faten A. Aljiffrey},
  title = {Kinetics and Mechanistic Study of Oxidation of Pyridine Derivative by Cerium(IV) in Aqueous Perchloric Acid},
  journal = {American Journal of Physical Chemistry},
  volume = {5},
  number = {1},
  pages = {10-16},
  doi = {10.11648/j.ajpc.20160501.12},
  url = {https://doi.org/10.11648/j.ajpc.20160501.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajpc.20160501.12},
  abstract = {The kinetics of oxidation of N, N-dimethyl-N’-(pyridin-2-yl) formamidine (Py-F) by cerium(IV) was studied spectrophotometrically in aqueous perchloric acid solutions at a constant ionic strength of 1.0 mol dm-3 and at 20°C. The reaction showed first order dependence with respect to [Ce(IV)] and less than unit order with respect to [Py-F]. The reaction exhibited negative fractional-first order kinetics with respect to [H+]. The rate of reaction was not significantly affected by variation of either ionic strength or dielectric constant of the reaction medium. Addition of cerium(III) product did not affect the reaction rate. A suitable mechanistic scheme for the oxidation reaction has been proposed. The final oxidation products were identified as 2-aminopyridine, dimethylamine and carbon dioxide. The activation parameters have been evaluated and discussed. The rate law associated with the reaction mechanism was derived.},
 year = {2016}
}

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TY - JOUR
T1 - Kinetics and Mechanistic Study of Oxidation of Pyridine Derivative by Cerium(IV) in Aqueous Perchloric Acid
AU - Ahmed Fawzy
AU - Ishaq A. Zaafarany
AU - Fahd A. Tirkistani
AU - Ameena Al-Bonayan
AU - Faten A. Aljiffrey
Y1 - 2016/02/04
PY - 2016
N1 - https://doi.org/10.11648/j.ajpc.20160501.12
DO - 10.11648/j.ajpc.20160501.12
T2 - American Journal of Physical Chemistry
JF - American Journal of Physical Chemistry
JO - American Journal of Physical Chemistry
SP - 10
EP - 16
PB - Science Publishing Group
SN - 2327-2449
UR - https://doi.org/10.11648/j.ajpc.20160501.12
AB - The kinetics of oxidation of N, N-dimethyl-N’-(pyridin-2-yl) formamidine (Py-F) by cerium(IV) was studied spectrophotometrically in aqueous perchloric acid solutions at a constant ionic strength of 1.0 mol dm-3 and at 20°C. The reaction showed first order dependence with respect to [Ce(IV)] and less than unit order with respect to [Py-F]. The reaction exhibited negative fractional-first order kinetics with respect to [H+]. The rate of reaction was not significantly affected by variation of either ionic strength or dielectric constant of the reaction medium. Addition of cerium(III) product did not affect the reaction rate. A suitable mechanistic scheme for the oxidation reaction has been proposed. The final oxidation products were identified as 2-aminopyridine, dimethylamine and carbon dioxide. The activation parameters have been evaluated and discussed. The rate law associated with the reaction mechanism was derived.
VL - 5
IS - 1
ER -

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Author Information

Ahmed Fawzy

Chemistry Department, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
Ishaq A. Zaafarany

Chemistry Department, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
Fahd A. Tirkistani

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

Chemistry Department, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
Faten A. Aljiffrey

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

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APA Style

Ahmed Fawzy, Ishaq A. Zaafarany, Fahd A. Tirkistani, Ameena Al-Bonayan, Faten A. Aljiffrey. (2016). Kinetics and Mechanistic Study of Oxidation of Pyridine Derivative by Cerium(IV) in Aqueous Perchloric Acid. American Journal of Physical Chemistry, 5(1), 10-16. https://doi.org/10.11648/j.ajpc.20160501.12

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ACS Style

Ahmed Fawzy; Ishaq A. Zaafarany; Fahd A. Tirkistani; Ameena Al-Bonayan; Faten A. Aljiffrey. Kinetics and Mechanistic Study of Oxidation of Pyridine Derivative by Cerium(IV) in Aqueous Perchloric Acid. Am. J. Phys. Chem. 2016, 5(1), 10-16. doi: 10.11648/j.ajpc.20160501.12

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AMA Style

Ahmed Fawzy, Ishaq A. Zaafarany, Fahd A. Tirkistani, Ameena Al-Bonayan, Faten A. Aljiffrey. Kinetics and Mechanistic Study of Oxidation of Pyridine Derivative by Cerium(IV) in Aqueous Perchloric Acid. Am J Phys Chem. 2016;5(1):10-16. doi: 10.11648/j.ajpc.20160501.12

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@article{10.11648/j.ajpc.20160501.12,
  author = {Ahmed Fawzy and Ishaq A. Zaafarany and Fahd A. Tirkistani and Ameena Al-Bonayan and Faten A. Aljiffrey},
  title = {Kinetics and Mechanistic Study of Oxidation of Pyridine Derivative by Cerium(IV) in Aqueous Perchloric Acid},
  journal = {American Journal of Physical Chemistry},
  volume = {5},
  number = {1},
  pages = {10-16},
  doi = {10.11648/j.ajpc.20160501.12},
  url = {https://doi.org/10.11648/j.ajpc.20160501.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajpc.20160501.12},
  abstract = {The kinetics of oxidation of N, N-dimethyl-N’-(pyridin-2-yl) formamidine (Py-F) by cerium(IV) was studied spectrophotometrically in aqueous perchloric acid solutions at a constant ionic strength of 1.0 mol dm-3 and at 20°C. The reaction showed first order dependence with respect to [Ce(IV)] and less than unit order with respect to [Py-F]. The reaction exhibited negative fractional-first order kinetics with respect to [H+]. The rate of reaction was not significantly affected by variation of either ionic strength or dielectric constant of the reaction medium. Addition of cerium(III) product did not affect the reaction rate. A suitable mechanistic scheme for the oxidation reaction has been proposed. The final oxidation products were identified as 2-aminopyridine, dimethylamine and carbon dioxide. The activation parameters have been evaluated and discussed. The rate law associated with the reaction mechanism was derived.},
 year = {2016}
}

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