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21.
V. N. Tsarev S. I. Konkin N. M. Loim E. S. Kelbysheva L. N. Popova P. V. Petrovskii V. A. Davankov K. N. Gavrilov 《Russian Journal of Coordination Chemistry》2007,33(9):656-660
The planar chiral diaryl phosphorimidite ligand containing additional C-stereocenters and neutral and cationic palladium(II) chelates with this ligand, cis-[Pd(η2-P,N)Cl2] and [Pd(Allyl)(η2-P,N)]BF4, were synthesized for the first time. The possibility of using these compounds in asymmetric allylic alkylation of 1,3-diphenylallyl acetate with dimethyl malonate in an optical yield of up to 73% was demonstrated. 相似文献
22.
23.
S. P. Tsarev 《Theoretical and Mathematical Physics》2000,122(1):121-133
Using a new definition of the generalized factorization of linear partial differential operators, we discuss possible generalizations
of the Darboux integrability of nonlinear partial differential equations.
Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 122, No. 1, pp. 144–160, January, 1999. 相似文献
24.
Gavrilov K. N. Bondarev O. G. Tsarev V. N. Shiryaev A. A. Lyubimov S. E. Kucherenko A. S. Davankov V. A. 《Russian Chemical Bulletin》2003,52(1):122-125
New chiral oxazoline-containing phosphoramidite was synthesized and its complex formation with rhodium(i) and palladium(ii) was examined. The new ligand is a highly efficient chiral inductor (ee up to 92%) in palladium-catalyzed asymmetric sulfonylation of 1,3-diphenylallyl acetate with sodium p-toluenesulfinate. 相似文献
25.
A. I. Golovashkin G. A. Gusev L. N. Zherikhina B. N. Lomonosov V. A. Tsarev A. M. Tskhovrebov 《Bulletin of the Lebedev Physics Institute》2007,34(10):296-301
Problems of dark matter (DM) particle detection are briefly reviewed. An original two-channel scheme for direct detection of cosmic DM particles is proposed. This scheme is based on a superlow-temperature calorimeter which includes a nuclear spin system whose magnetic response is measured by a quantum interferometer (SQUID). Low threshold and the capability for efficiently suppressing the recoil-electron background are the most important advantages of the proposed scheme. They make it possible to detect DM particles in the range of extremely low recoil energies and carry out direct DM search with high sensitivity. 相似文献
26.
The results of the Monte Carlo simulation of the LORD experiment are presented for two types of antenna systems with various parameters. The effect of possible polarization mismatch and galactic noise “percolation” are taken into consideration. 相似文献
27.
Comparative characteristics of aramide fiber reinforced plastics (AFRP) made by laser cutting or machining are presented. It is found that the strength of the specimens cut out by laser is 4–25% higher, while the moisture absorption is at least 2 times lower as compared to those cut out by machining. The deviation of the cutting edge size for AFRP 2 mm thick does not exceed 0.4 mm. Calculated and experimental data are given. The possibilities and conditions of cutting the AFRP up to 6 mm thick are determined.Translated from Mekhanika Kompozitnykh Materialov, Vol. 35, No. 3, pp. 375–384, May–June, 1999. 相似文献
28.
29.
M. V. Tsarev V. V. Mokrushin A. V. Sten’gach A. I. Tarasova P. G. Berezhko I. K. Kremzukov E. V. Zabavin 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2010,84(4):679-683
The oxidation of titanium hydride powder by air oxygen and the influence of oxidation conditions on the degree of oxidation of hydride particles, specific gas content in the powder, and kinetics of its thermal decomposition were studied. The resistometry method was used to determine the effective activation energy of oxidation of titanium hydride by air oxygen. The content of the surface nonconducting phase formed by titanium oxide and oxohydride films under various oxidation conditions was estimated. 相似文献
30.
Bondarev O. G. Mikhel I. S. Tsarev V. N. Petrovskii P. V. Davankov V. A. Gavrilov K. N. 《Russian Chemical Bulletin》2003,52(1):116-121
The complex formation of bi- and tricyclic hydrophosphorane derivatives of isoleucinol with [Pt(COD)Cl2], [Rh(CO)2Cl]2, and [Rh(THF)2(COD)]+BF4
– (COD is cycloocta-1,5-diene) was investigated. In all cases, bicyclic hydrospirophosphorane selectively forms the metal chelates [M(2-PN)(X)Cl] (M = Pt, X = Cl; M = Rh, X = CO) and [Rh(2-PN)(COD)]+BF4
–. («» denotes the residue of the hydrospirophosphorane ligand, which does not contain the P and N atoms). In addition, tricyclic hydrophosphorane (L) generates the phosphoranide complexes [Pt(1-L)(COD)Cl]+Y– (Y = Cl or BF4). The structures of the new compounds were established by IR spectroscopy, 31P, 13C, 1H, 2H, 11B, 19F, and 195Pt NMR spectroscopy, and plasma-desorption and electrospray ionization mass spectrometry. The possible mechanism of coordination of hydrophosphoranes is discussed. 相似文献