Kinetic investigation of oxidation of aromatic anils by magnesium monoperoxyphthalate in aqueous acidic medium

• Authors: Venkatesh Ramakrishnan , Karunakaran Kulandaivelu
• Languages of publication: EN

Abstracts

EN

The kinetics of oxidation of aromatic anils to benzaldehyde and azobenzene by magnesium monoperoxyphthalate (MMPP) has been studied in aqueous acetic acid medium. The low dielectric constant of the medium facilitates the reactivity. It has been found that ionic strength of the reaction has no significant effect on rate. The added acrylonitrile has no effect on the reaction rate indicating the absence of free radical mechanism. The added Mn(II) decreases the rate of the reaction, which indicates the involvement of two-electron transfer. Highly negative ΔS# values indicate a structured transition state. The deviation of Hammett plot is noted and a non-linear concave downward curve is obtained for the anils with substituents in the aniline moiety. The observed break in the log kobs versus σ is attributed to the transition state whereas the non-linear concave upward curve is observed for the substituents in the benzaldehyde moiety and a non-linear concacve upward curve is observed for the substituents in the combination of aniline and benzaldehyde moiety and a suitable mechanism is proposed

Keywords

EN

Aromatic anils; Kinetics; Oxidation; Magnesium monoperoxyphthalate

• Publisher: De Gruyter Open
• Journal: Polish Journal of Chemical Technology
• Year: 2013
• Volume: 15
• Issue: 3
• Pages: 55-60

Dates

published

1 - 09 - 2013

online

20 - 09 - 2013

Contributors

author

Venkatesh Ramakrishnan

• Sona College of Technology (Autonomous), Department of Chemistry, Salem – 636005, Tamilnadu, India

author

Karunakaran Kulandaivelu

• Sona College of Technology (Autonomous), Department of Chemistry, Salem – 636005, Tamilnadu, India

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Identifiers

DOI

10.2478/pjct-2013-0044