Oxidative Study of Benzaldehyde by Isoqauinolinium Bromo Chromate

Arun Kumar Dwivedi,Arvind Prasad Dwivedi,Kamal Nayan Sharma

doi:10.24297/jac.v16i0.8248

Arun Kumar Dwivedi, Arvind Prasad Dwivedi + Show 1 more

Open Access

https://doi.org/10.24297/jac.v16i0.8248

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Abstract

The kinetics analysis of the oxidative reaction between benzaldehyde and oxidant is quinolinium Bromo chromate was reported in aqueous 40% acetic acid medium at 313 K. The rate of reaction varies first-power of [IQBC] and [H2SO4], whereas fractional-order kinetics was observed for benzaldehyde. The rate constant gradually increases with decrease in dielectric constant of the medium. The neutral salt does not alter the rate. The metal cations (Cu++) slightly accelerate the rate of oxidation when added to reaction mixture. The study rules out the participation of keto form of substrate in complex formation. Benzoic acid was identified as the end-product in stoichiometrically 1:1 based mechanism. The rate law was derived in accordance with the kinetic results.

Highlights

Several chromium(VI) compounds have been introduced in literature as oxidizing agent, capable of oxidizing almost every oxidizing functional group
In order to avoid above difficulties, recently an excellent Is quinolinium Bromo chromate oxidant has been inducted in literature of kinetics for oxidation of anilines,[1] phenols,[2] alcohols,[3,4] and ketones.[5]
The controversy always persists about the attack of H2CrO4, active species of IQBC at enolic or keto or gemdiol position of benzaldehyde

Summary

Introduction

Several chromium(VI) compounds have been introduced in literature as oxidizing agent, capable of oxidizing almost every oxidizing functional group. Such oxidant possesses high acidity, photosensitivity, instability take long reaction time and need for large excess of reagent. In order to avoid above difficulties, recently an excellent Is quinolinium Bromo chromate oxidant has been inducted in literature of kinetics for oxidation of anilines,[1] phenols,[2] alcohols,[3,4] and ketones.[5] In proposed study, the benzaldehyde containing carbonyl group exhibited a variety of chemical reactions with oxidizing reagents viz. SeO2,6 BAT,[7] NBSA,[8] acid bromate[9] and NCSA10 etc. In order to remove this ambiguity, the task of oxidation of this substrate with IQBC was chosen for investigation

Experimental

Procedure

Results and Discussion