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排序方式: 共有377条查询结果,搜索用时 234 毫秒
1.
Russian Chemical Bulletin - The N-methylation of primary carboxamides is based on two consecutive reactions. The silylation of the corresponding carboxamides with chloro(chloromethyl)dimethylsilane... 相似文献
2.
Rumyantcev R. V. Zolotareva N. V. Novikova O. V. Petrov B. I. Lazarev N. M. Semenov V. V. 《Crystallography Reports》2021,66(3):441-447
Crystallography Reports - Reactions of nitrilotriacetic acid with 2-aminoethanol, 2-amino-2-(hydroxymethyl)propane-1,3-diol, and 2,2'-(ethylenedioxy)bis(ethylamine) afford the following salts... 相似文献
3.
Lazarev S. I. Kovalev S. V. Konovalov D. N. Lua P. 《Russian Journal of Electrochemistry》2021,57(6):607-624
Russian Journal of Electrochemistry - Electrochemical and transport characteristics of systems equipped with OPMN-P and OFAM-K membranes during operation in electronanofiltration cell are studied... 相似文献
4.
1-Phenyl-2-azasilatran-3-ones have been studied by multinuclear NMR spectroscopy. The π-accepting ability of 2-azasilatran-3-one groups is substantially lower and their σ-donating ability is higher than those of (acetamido)diethoxysilyl groups of the model tetracoordinated compounds. 相似文献
5.
N. P. Lazarev 《Journal of Applied Mechanics and Technical Physics》2013,54(4):662-671
The condition of mutual nonpenetration of the crack faces is proposed for a Timoshenko plate with an oblique crack, whose initial state is defined by a surface the normal to which makes a small angle with the middle plane. Unique solvability of the variational problem of plate equilibrium with the nonpenetration conditions for the crack faces specified on the curve describing the crack is proved. A differential formulation of the problem equivalent to the original formulation for sufficiently smooth solutions is proposed. For the one-dimensional case (beam with a cut), an analytical solution is obtained, and the cases of longitudinal tension and compression are examined. 相似文献
6.
G. P. Mikhailov L. V. Rabchuk V. V. Lazarev 《Russian Journal of Inorganic Chemistry》2017,62(4):523-526
Manifestations of ion association of lithium cation with BrO3 - ion in the vibrational spectrum have been studied by IR spectroscopy. The microstructure of the bromate ion with lithium cation in a contact ion pair in an aprotic solvent has been determined by the density functional theory method in the B3LYP/cc-pVTZ approximation, and the vibrational spectrum of coordinated bromate ion has been calculated. 相似文献
7.
8.
An electroded heterostructure consisting of a dye layer sandwiched between two polymer ferroelectric layers is discussed.
The dye layer plays a role of the probe of the electric field measured by an electroabsorption technique. Using this new method
the electric field in ferroelectric and dielectric layers can be measured separately. When an a.c. voltage is applied to the
heterostructure, the electric field in the dye layer increases 2.2 times (up to 0.55 GV/m), whereas the field in the ferroelectric
decreases 2 times with respect to the average field in the entire structure. Moreover, the dye layer sandwiched between the
ferroelectric layers may stand without breakdown the fields 5–7 times higher than a neat reference dye layer confined between
metal electrodes. Therefore, the performance of electro-optical, electromechanical and other field controlled devices may
be improved considerably when their functional materials are placed between ferroelectrics layers. 相似文献
9.
N. M. Lazarev B. I. Petrov G. A. Abakumov M. A. Katkova T. V. Balashova Yu. A. Bessonova V. I. Faerman A. V. Arapova T. I. Lopatin 《Russian Journal of General Chemistry》2012,82(7):1250-1253
A new class of Sc, Eu, and Tb complexes with N,O-chelate ligands was synthesized for the first time. The mass spectra, thermogravimetric analysis, differential scanning calorimetry data, as well as the data on the saturated vapor pressure of the compounds were obtained. The main thermochemical parameters of the compounds were calculated. 相似文献
10.
A. N. Artemov E. V. Sazonova M. V. Revin K. V. Rybkin M. A. Lazarev V. I. Faerman 《Russian Chemical Bulletin》2011,60(10):2103-2106
Cycloaddition of η6-(styrene)chromium tricarbonyl to hexa-2,4-diene or cyclopentadiene afford the Diels-Alder adducts with retention of the Cr(CO)3 group, whereas cyclohexa-1,3-diene undergoes aromatization to give η6-(benzene)chromium tricarbonyl. The counter synthesis of these (arene)chromium tricarbonyl derivatives from uncoordinated adducts of the Diels-Alder reaction and chromium hexacarbonyl was carried out. 相似文献