Kinetics and structure reactivity correlation in the oxidation of some para- substituted benzhydrols by benzimidazolium dichromate
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Title |
Kinetics and structure reactivity correlation in the oxidation of some para- substituted benzhydrols by benzimidazolium dichromate
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Creator |
Panday, Dinesh
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Subject |
Benzhydrols
Kinetics Mechanism Oxidation Correlation Benzimidazolium dichromate |
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Description |
372-379
The oxidation of some para-substituted benzhydrols by benzimidazolium dichromate (BIDC) in dimethyl sulfoxide (DMSO) medium, results in the formation of corresponding diphenyl ketone. The reaction has been investigated on the condition of pseudo-first order. In terms of both BIDC and hydrogen-ion, the reaction is first order. In the case of benzhydrols, however, Michaelis-Menten type kinetics is observed. At different temperatures, the formation constants and rates of breakdown of benzhydrol-BIDC complexes have been determined. Complex formation thermodynamic parameters and activation parameters for complex decomposition have been computed. The kinetic isotope effect found in the oxidation of benzhydrol ((kH/kD = 5.93 at 293 K) shows that the rate-determining step involved α-C-H bond fission. For the kinetic analysis of the reaction, nineteen organic solvents have been utilized. The solvent impact have been investigated, and found that cation-solvation plays a significant role. A suitable mechanism is proposed based on the kinetic data, solvent effect analysis, and results of various non-kinetic parameters. |
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Date |
2023-04-17T10:12:18Z
2023-04-17T10:12:18Z 2023-04 |
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Type |
Article
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Identifier |
2583-1321 (Online); 0019-5103 (Print)
http://nopr.niscpr.res.in/handle/123456789/61771 https://doi.org/10.56042/ijc.v62i4.410 |
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Language |
en
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Publisher |
NIScPR-CSIR, India
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Source |
IJC Vol.62(04) [Apr 2023]
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