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Kinetische Untersuchung der Oxydation von 1,2,4,5-Tetramethylbenzol in einem polaren Lösungsmittel

Kinetic Investigation of the oxidation of 1.2.4.5-tetramethylbenzene in polar solvents

  • Anorganische, Struktur- und Physikalische Chemie
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Monatshefte für Chemie / Chemical Monthly Aims and scope Submit manuscript

Abstract

A kinetic study was made of the liquid-phase oxidation of 1.2.4.5-tetramethylbenzene in polar solvents. It was shown that the catalytic activity of the cobalt salt catalysts used varies as the hydrocarbon concentration decreases, a finding attributed to the anionic effects in the catalyst. The catalytic activity of the cobaltous salts of nicotinic and isonicotinic acid was found to be high at low durene concentrations. Of the bromine derivatives studied as promotors, N-bromoacetamide was found to be the most effective. The effect of the polar solvent on the kinetics of the oxidation of durene was also studied in media containing acetic acid, acetic anhydride and mixtures thereof. The relationship between the rate constant (k) in acetic anhydride and the rate constant (k 0) in acetic acid is found to be the following:

$$\lg k = \lg k_0 + 24.59\frac{{\varepsilon - 1}}{{2\varepsilon + 1}}$$

A tentative mechanism of the oxidation steps is advanced to explain the higher values of the rate constant in acetic anhydride.

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Authors and Affiliations

  1. Hochschule für Chemische Technologie, Sofia, Bulgarien

    Antoaneta D. Stefanova, Philip I. Iotov & Dimcho I. Dimitrov

Authors
  1. Antoaneta D. Stefanova
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  2. Philip I. Iotov
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  3. Dimcho I. Dimitrov
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Stefanova, A.D., Iotov, P.I. & Dimitrov, D.I. Kinetische Untersuchung der Oxydation von 1,2,4,5-Tetramethylbenzol in einem polaren Lösungsmittel. Monatshefte für Chemie 106, 795–800 (1975). https://doi.org/10.1007/BF00902184

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  • DOI: https://doi.org/10.1007/BF00902184

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