Kinetics and mechanism of the oxidation of some cis-Alpha- Phenylcinnamic acids by Pyridinium Chlorochromate

Authors

  • S. Nalini
  • R. Udhayakumar Department of Chemistry, Bharathidasan Institute of Technology (BIT) Campus, Anna University, Tiruchirappalli-620024, Tamilnadu, India.
  • K. Anbarasu Department of Chemistry, Arignar Anna Govt. Arts College, Musiri – 621 211
  • P. Manivannan Department of Chemistry, IFET College of Engineering, Villupuram - 605108
  • K. Raghu Department of Chemistry, Krishnasamy College of Engineering & Technology, Cuddalore – 607109

DOI:

https://doi.org/10.24297/jac.v12i5.5993

Keywords:

Kinetics, oxidation, cis--Phenyl cinnamic acids, Pyridinium Chorochromate

Abstract

Oxidation of cis α-phenyl cinnamic acids by pyridinium chlorochromate (PCC) was studied in acetic acid–water mixture
containing perchloric acid. The reaction rate is first order in [PCC] and fractional order in [H+] and has aldehyde as a
product. The rate of reaction increases with increase in the percentage of acetic acid medium. The reactions exhibit kinetic
isotope effect. The activation parameters have been evaluated. The added Mn (II) decreases the rate of reaction. The
added sodium chlorate has no effect on the reaction rate and indicates the absence of ion-ion (or) ion- dipole interaction in
the slow step. The deviation of Hammett plot is noted and a “V†shaped curve is obtained.

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Published

2017-03-20

How to Cite

Nalini, S., Udhayakumar, R., Anbarasu, K., Manivannan, P., & Raghu, K. (2017). Kinetics and mechanism of the oxidation of some cis-Alpha- Phenylcinnamic acids by Pyridinium Chlorochromate. JOURNAL OF ADVANCES IN CHEMISTRY, 12(5), 4434–4441. https://doi.org/10.24297/jac.v12i5.5993

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Vol. 12 No. 5 (2016)

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Articles

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