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1.
Half-wave potentials of the one-electron electrochemical oxidation (E
1/2
ox) of hydroquinolines with different degrees of heterocycle hydrogenization as well as containing substituents of various natures in the benzene ring and heterocycle have been measured. Linear correlations betweenE
1/2
ox and the values of the Hammett polar -constants form- andp-substituents in dihydroquinolines and related sulfur-containing dithiolthiones were established. The character of the variation ofE
1/2
ox in the series of hydroquinolines was found to correlate with the characteristic features of the inhibiting action of these compounds in the liquid-phase oxidation of various hydrocarbons. However, in contrast to phenolic antioxidants for hydroquinolines, there is no dependence of the retardation period onE
1/2
oxin the oxidation of hydrocarbons at temperatures higher than 100 °C.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 610–613, April, 1994. 相似文献
2.
L. M. Pisarenko T. V. Maksimova Z. S. Kartasheva O. T. Kasaikina 《Russian Chemical Bulletin》2003,52(7):1500-1503
The temperature effect on the rate of the decomposition of hydroperoxides and the rate of the formation of free radicals in the oxidation of ethylbenzene with molecular oxygen in the presence of -phenylethyl hydroperoxide—cetyltrimethylammonium bromide (CTAB) as a catalytic system for free radical generation was studied by kinetic methods (from the oxygen consumption and hydroperoxide decomposition rates) and the inhibition method involving different acceptors of free radicals. 相似文献
3.
4.
O. T. Kasaikina Z. S. Kartasheva A. B. Mazaletskii N. Yu. Sakova Zh. V. Shmyreva Kh. S. Shikaliev 《Russian Chemical Bulletin》1992,41(2):329-332
Phenols (hydroquinone and -tocopherol) and heterocyclic aminophenols (2,2,4-trimethyl-6-ethoxy-1,2-dihyroquinoline) reduce N,N-diphenyl-p-quinonediimine (A) to the diamine. With difunctional hydrogen atom donors, the reaction rate is proportional to the concentrations of the reactants. The effective rate constants have been determined over a range of temperatures. In the reaction of A with -tocopherol, plots of rate versus initial concentrations are nonlinear, 2,6-Di-tert-butyl-4-methylphenol and 2,2,4-trimethyl-6-ethoxy-1,2-dihyroquinoline do not react with A under the same conditions.N.N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, 117977 Moscow. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 2, pp. 417–420, February, 1992. 相似文献
5.
6.
The effect of the structurization of a natural surfactant, egg phosphatidylcholine (lecithin, LH), in solutions in organic solvents on the kinetics of its oxidation by molecular oxygen is studied. The oxidation of LH proceeds via chain free-radical mechanism like the oxidation of hydrocarbons and oils; the oxidizability of LH is close to that of cyclohexene derivatives, methyl linoleate, and sunflower oil. The formation of reverse micelles in LH solutions results in a nonlinear dependence of the rate of oxygen absorption on the substrate concentration. Strong oil-soluble antioxidants decelerate oxygen absorption, however, do not suppress intramicellar oxidation. The addition of CaCl2 causes the disintegration of reverse LH micelles. Resulting LH-CaCl2 adduct is oxidized at a higher rate than the original LH and catalyzes the formation of radicals through the decomposition of hydroperoxides similarly to acetylcholine chloride. 相似文献
7.
We have obtained data on the rates of homolysis and induced decomposition of dicyclohexylperoxydicarbonate (PC) in different types of solvents: n-decane, cyclohexane, chlorobenzene, acetonitrile. The rate of induced decomposition is determined by the activity of the radicals formed from the solvent. We have established that benzene and chlorobenzene participate in radical reactions of induced decomposition of PC, which leads to formation of a number of isomeric aryl-containing compounds.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 1, pp. 48–55, January, 1991.We thank A. B. Gagarina for participation in discussion of the results. 相似文献
8.
O. T. Kasaikina A. A. Golyavin D. A. Krugovov Z. S. Kartasheva L. M. Pisarenko 《Moscow University Chemistry Bulletin》2010,65(3):206-209
The features of the catalytic effects of surfactants (S) in the oxidation of hydrocarbons and lipids are considered. It is
shown that the primary amphiphilic products of the oxidation of hydroperoxides (ROOH) and lipids and the known cationic surfactants
form mixed micelles {nS-mROOH} in which the accelerated decomposition of ROOH occurs and other polar components, such as metal-containing compounds,
inhibitors, etc., can be concentrated, thus producing a large effect on the oxidation rate and mechanism. 相似文献
9.
Loshadkin D. V. Pliss E. M. Kasaikina O. T. 《Russian Journal of Applied Chemistry》2020,93(7):1090-1095
Russian Journal of Applied Chemistry - The kinetics of oxygen absorption during the oxidation of methyl linoleate in Triton X-100 micelles has been studied. The order of the reaction with respect... 相似文献
10.