Mechanism of the oxidative ketones by quinolinium dichromate

Mechanism of the oxidative ketones by quinolinium dichromate

Registration ID: IJNRD_215486

Published ID: IJNRD2403447

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Khemraj Kanauje , D. K. Dwivedi , Babbu Lal Patel

The kinetics of the oxidation of ketones (cyclic and arylalkyl) by quinolinium dichromate (QDC), in an acid medium, has been investigated. The rate of the reaction was proportional to the concentrations of the ketone, QDC, and acid. The order of reactivity for the cyclic ketones was C6 > C8 > C5 > C7 (ring size) and acetophenone > propiophenone > butyrophenone > valerophenone (arylalkyl ketones). A kinetic isotope effect, kH/kD = 5.80, was observed (cyclohexanone and cyclohexanone–d4). The rate data have been rationalized using conformational considerations. The mechanism involved the attack of the protonated QDC on the enol form (of the ketone), in the rate-determining step, forming a cyclic chromate ester. Subsequent cleavage of the car- bon–carbon bond of the ester yielded carboxylic acids as the products.

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"Mechanism of the oxidative ketones by quinolinium dichromate", IJNRD - INTERNATIONAL JOURNAL OF NOVEL RESEARCH AND DEVELOPMENT (www.IJNRD.org), ISSN:2456-4184, Vol.9, Issue 3, page no.e380-e392, March-2024, Available :https://ijnrd.org/papers/IJNRD2403447.pdf

Volume 9 Issue 3, March-2024

Pages : e380-e392

Paper Reg. ID: IJNRD_215486

Published Paper Id: IJNRD2403447

Downloads: 000121185

Research Area: Chemistry

Country: Rewa, M.P., India

Published Paper PDF: https://ijnrd.org/papers/IJNRD2403447.pdf

Published Paper URL: https://ijnrd.org/viewpaperforall?paper=IJNRD2403447

Journal Name: INTERNATIONAL JOURNAL OF NOVEL RESEARCH AND DEVELOPMENT(IJNRD)

ISSN: 2456-4184 | IMPACT FACTOR: 8.76 Calculated By Google Scholar | ESTD YEAR: 2016

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