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1.
N. O. Mchedlov-Petrosyan L. A. Fedorov S. A. Sokolovskii Yu. N. Surov R. Salinas Maiorga 《Russian Chemical Bulletin》1992,41(3):403-409
A study has been made of the acidic ionization, structural conversions, and prototropic tautomerism of rhodamine chromogens in methanol and dimethyl sulfoxide, using IR,
13
C NMR, and electronic spectroscopy. The lactone structure has been established for the colorless form of rhodamines in DMSO. For rhodamine B in mixtures of water with DMSO, the lactone/zwitterion ratio has been estimated.V. I. Vernadskii Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Moscow 117975. Khar'kov State University, Khar'kov 310077. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 3, pp. 512–521, March, 1992. 相似文献
2.
3.
4.
Hydrolysis in the Fe3
+-Cd2
+-NO3
--H2O system was studied by spectrophotometry, pH-metric titration, dialysis, and sorption techniques. Mutual influence of cations in their hydrolytic and sorption behavior was discussed from the viewpoint of the heteronuclear complex formation. 相似文献
5.
The influence of ammonia on propane oxidation over a Ga–Sb oxide catalyst has been studied. Acrylonitrile is formed upon the interaction of acrolein with partially dehydrogenated ammonia. Ammonia increases the rates of overall and selective oxidation of propane. This is assumed to be due to the formation of electron-donor sites promoting proton separation from the propane molecule.
. , . . , , .相似文献
6.
E. G. Ismailov V. F. Anufrienko N. G. Maksimov V. D. Sokolovskii 《Reaction Kinetics and Catalysis Letters》1975,3(3):301-304
It has been found by the ESR technique that the adsorption of propylene on zinc oxide leads to the formation of a -allyl radical. It is suggested that the radical species of the surface allyl compound on this catalyst is responsible for its high selectivity in the dehydroaromatization of propylene to benzene.
, - . , .相似文献
7.
O. Yu. Ovsitser A. A. Davydov Z. G. Osipova V. D. Sokolovskii 《Reaction Kinetics and Catalysis Letters》1989,38(1):125-130
Rate constants for the aminolysis of o-(2,4-dinitrophenyl) cyclopentanone oxime with several primary alkylamines, C2H5NH2–C6H13NH2 and one secondary arylamine, purrolidine, in 11 water-acetonitrile are reported. With primary amines, base catalysis is absent, while with pyrrolidine saturation catalysis has been observed. Reduction in size of nonconjugated oxime moiety (leaving group), drastically decreases the rates. Thermodynamic parameters for these reactions have also been calculated.
O-(2,4-) (C2H5NH2–C6H13NH2) , , : =11. , . ( ) . .相似文献
8.
S. N. Vereshchagin A. G. Anshits V. D. Sokolovskii N. G. Maksimov 《Reaction Kinetics and Catalysis Letters》1984,26(3-4):419-423
Catalytic properties of AlBr3, AlBr3–CuCl2 and AlBr3–NiSO4 in liquid-phase conversion of butane and pentane have been examined. A possibility for the oxidative condensation has been revealed due to both the stoichiometric reduction of Ni2+ and Cu2+ ions entering into the composition of superacid catalysts, and the catalytic oxidation in the presence of bromine as an oxidant. Nature of the centers responsible for the oxidative condensation of lower paraffins is discussed.
AlBr3; AlBr3–CuCl2; AlBr3–NiSO4 . , Ni2+, Cu2+, , . , .相似文献
9.
J. Tichy M. M. Andrushkevich G. K. Boreskov A. A. Davidov L. M. Plyasova V. D. Sokolovskii 《Reaction Kinetics and Catalysis Letters》1976,5(4):407-413
The products of selective oxidation are shown to be formed via a stepwise mechanism with participation of surface allylic complexes. A successive transformation of -allyl to -allyl and further to acrolein is possible. The products of complete oxidation may be formed through surface carbonate-carboxylate complexes via either a stepwise mechanism involving the catalyst's oxygen, or a concerted mechanism with the participation of molecular oxygen.
, . - -, . - , .相似文献
10.
A. V. Sokolovskii 《Journal of Mathematical Sciences》1981,17(5):2166-2173
One investigates the problem of the accuracy of upper estimates by the method of the large sieve.Translated from Zapiski Nauchnykh Seminarov Leningradskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova AN SSSR, Vol. 91, pp. 125–133, 1979. 相似文献