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排序方式: 共有133条查询结果,搜索用时 312 毫秒
1.
Gaineev A. M. Galkina I. V. Davletshin R. R. Davletshina N. V. Kuznetsov N. O. Grishaev D. Yu. Shulayeva M. P. Pozdeev O. K. 《Russian Journal of General Chemistry》2022,92(7):1208-1213
Russian Journal of General Chemistry - Aminophosphabetaines, i.e., isobutyl {[alkyl(dimethyl)ammonio]methyl}phosphonates with higher alkyl substituents at the nitrogen atom, were obtained by a... 相似文献
2.
Galkina E. G. Zaspel C. E. Ivanov B. A. Kulagin N. E. Lerman L. M. 《JETP Letters》2019,110(7):481-486
JETP Letters - The motion of domain walls in GdFeCo-type ferrimagnets near the point of compensation of sublattice spins s1 and s2, when the effects of the exchange increase in the limiting wall... 相似文献
3.
A nonlinear model is developed for the photoresponse of a bolometric structure taking into account the temperature dependences
of the thermal constants of the YBaCuO/MgO structure and its boundary thermal resistance. The model also allows for the specific
form of the currentvoltage characteristic of YBaCuO and the heat release from the transport current flow. A comparison between
the experimental data and the model showed that the nonlinear thermal model accurately describes the temporal characteristics
of the photoresponse.
Fiz. Tverd. Tela (St. Petersburg) 40, 191–194 (February 1998) 相似文献
4.
A. A. Sobanov A. V. Zolotukhin I. V. Galkina V. I. Galkin R. A. Cherkasov 《Russian Journal of General Chemistry》2006,76(3):421-429
A complex spectral (UV, IR, and 31P NMR), preparative, and kinetic investigation of the mechanism of the noncatalytic variant of the Pudovik reaction in the series of imines was carried out. The reaction proceeds through a four-center cyclic transition state. The transition state is highly labile, which determines its high sensitivity to the structure of the reagents, the nature of the solvent and catalyst, and some other factors. The necessary condition for the hydrophosphorylation of imines to occur is the participation of proton-donor reagents and acidic admixtures, specifically hydrolysis products of dialkyl hydrogen phosphites, such as monoalkyl dihydrogen phosphates and phosphorous acid, which act as acid catalysts. When the starting reagents are thoroughly purified and no such catalysts are present, the Pudovik reaction fails to occur in the imine series. 相似文献
5.
Gololobov Yu. G. Galkina M. A. Dovgan O. V. Krasnova I. Yu. Petrovskii P. V. Antipin M. Yu. Voronzov I. I. Lyssenko K. A. Schmutzler R. 《Russian Chemical Bulletin》2001,50(2):279-286
The reactions of the zwitterion derived from triisopropylphosphine and ethyl 2-cyanoacrylate with mercuric chloride and aryl isothiocyanates containing Cl atoms in the ortho positions of the benzene ring follow an unusual pathway because this zwitterion represents latent triisopropylphosphine due to the reversibility of the reaction of triisopropylphosphine with ethyl 2-cyanoacrylate. The molecular structures of the adducts of triisopropylphosphine with 2,6-dichloro- and 2,4,6-trichlorophenyl isothiocyanates were confirmed by X-ray diffraction study. Protonation of the adduct of triisopropylphosphine with 2,6-dichlorophenyl isothiocyanate occurred at the nitrogen atom, whereas methylation with methyl trifluoromethanesulfonate afforded an S-methylation product. The results of X-ray diffraction study of the resulting compounds are presented. 相似文献
6.
I. I. Kandror M. A. Galkina I. O. Bragina B. D. Lavrukhin Yu. N. Belokon' Yu. G. Gololobov 《Russian Chemical Bulletin》1992,41(10):1928-1930
Ethyl -cyanocarylate undergoes the Michael reaction with strong CH-acids (pK
a < 13) in the presence of strong basic amines such as butylamine, piperidine, and triethylamine. Only polymerization of ethyl -cyanoacrylate occurs under the same conditions with weaker CH-acids in the presence of less basic amines such as aniline, N-methylaniline, and pyridine.A. N. Nesmeyanov Institute of Organometallic Compounds, Russian Academy of Sciences, 117813 Moscow. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 10, pp. 2449–2452, October, 1992. 相似文献
7.
I. I. Kandror B. D. Lavrukhin M. A. Galkina Yu. G. Gololobov 《Russian Chemical Bulletin》1992,41(1):176-178
Syntheses are reported for representatives of a new class of derivatives of -cyanoacrylic acid, namely, its salts with brucine, tert-butyldimethylamine, and diisopropylmethylamine.A. N. Nesmeyanov Institute of Organometallic Compounds, Russian Academy of Sciences, 117813 Moscow. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 1, pp. 212–214, January, 1992. 相似文献
8.
9.
Vladimir I. Galkin Gulchira M. Saakyan Irina V. Galkina Rafael A. Cherkasov 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-4)
Abstract Elaboration of effective methods of selective phosphorylation of α,β-unsaturated carbonyl compounds containing simultaneously C[dbnd]C and C[dbnd]O bonds, which may compete with each other or react consistently one after another, is one of the most complex problems in the modern organophosphorus synthesis. On the basis of our previous systematic investigations of kinetics and mechanism of the Pudovik and Abramov reactions in the series of α,β-unsaturated carbonyl compounds we have suggested three possible ways to solve this problem: a) soft reaction conditions, regulated by solvent, catalyst and temperature; b) interface catalysis; c) metallocomlex catalysis (reaction in the coordination sphere of transition metal). 相似文献
10.
I. V. Galkina G. L. Takhautdinova E. V. Tudrii L. M. Yusupova D. B. Krivolapov I. A. Litvinov R. A. Cherkasov V. I. Galkin 《Russian Journal of Organic Chemistry》2013,49(4):598-602
Stable crystalline σ-complexes (Meisenheimer adducts) were isolated for the first time in the reactions of superelectrophilic 4,6-dinitrobenzofuroxan with dodecyl- and hexadecylamines, and their structure was determined by X-ray analysis. 相似文献