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Aminova G. A. Manuiko G. V. Bronskaya V. V. Bronskii S. N. Ismagilova A. I. D'yakonov G. S. 《Kinetics and Catalysis》2004,45(2):288-296
Based on an analysis of experimental results and published data, the main elementary steps of the anionic coordination polymerization of butadiene rubber on a cobalt-containing catalyst in the presence of ethylene were found, and a mathematical model of the periodic process at an optimum water content was developed. The molecular-weight characteristics of the process depending on ethylene concentration were studied with the use of this model. 相似文献
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Usein M Dzhemilev Vladimir A D'yakonov Leila O Khafizova Askhat G Ibragimov 《Tetrahedron》2004,60(6):1287-1291
Cyclo- and carbomagnesiation of 1,2-dienes with EtMgR′ (R′=Et, Br) in the presence of Cp2ZrCl2 catalyst lead to alkylidenemagnesiocyclopentanes. Deuterolysis provides insights into the reaction pathways. 相似文献
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An efficient method for the synthesis of valuable N-, O-, and Si-containing 1Z,5Z-diene compounds was developed. The method comprises Cp2TiCl2-catalyzed homo- and cross-cyclomagnesiation of 1,2-dienes by Grignard reagents (RMgR′) to give 2,5-dialkylidenemagnesacyclopentanes in up to 96% yield. This approach was successfully used in the synthesis of 5Z,9Z-dienoic acids, precursors of acetogenins and insect pheromones. 相似文献
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A system of quasilinear equations of parabolic type which approximates a nonstationary Navier-Stokes problem is considered in this article. Triple layered implicit difference schemes with a linear operator on the upper layer are constructed for this system. Rapidly converging iterative methods can be applied to find a solution on the upper layer. It is proved that the proposed scheme has error O(
2+¦h¦2).Translated from Matematicheskie Zametki, Vol. 12, No. 1, pp. 59–66, July, 1972. 相似文献
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Minsker K. S. Zakharov V. P. Takhavutdinov R. G. D'yakonov G. S. Berlin Al. Al. 《Russian Journal of Applied Chemistry》2001,74(1):90-94
Use of a new type of apparatus, high-output small-size tubular turbulent reactors of mainly dif- fuser-confuser design, in very fast processes, including polymerization, is considered. The turbulent diffusion coefficient D
t and its distribution over the apparatus volume were calculated as functions of the confuser divergence angle . The calculations were confirmed by experimental data. New reactor designs for a number of processes of large-tonnage polymer production were proposed and put into practice. 相似文献
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