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111.
112.
V. V. Troshin I. V. Mironov L. A. Sheludyakova 《Russian Journal of Inorganic Chemistry》2009,54(12):2018-2021
The use of precision IR spectrometry for determining the hydration numbers of species in organic phase was considered. The
hydration numbers of HAuCl4 (n = 3), HFeCl4 (n = 3), HNO3 (n = 0), HClO4 (n = 2), and HCl (n = 1) in 0.64 M (15 vol. %) TBP in CCl4 were determined. 相似文献
113.
114.
Mironov V. F. Borisova Yu. Yu. Burnaeva L. M. Gubaidullin A. T. Dobrynin A. B. Litvinov I. A. Musin R. Z. Konovalova I. V. 《Russian Chemical Bulletin》2010,59(4):820-827
Phosphorylation of 2-hydroxyphenyl 2,2,2-trifluoro-1-hydroxy-1-(trifluoromethyl)ethyl ketone with dichloro(phenyl)phosphine
gave 5-oxo-2-phenyl-4,4-bis(trifluoromethyl)-4,5-di-hydro-1,3,2-benzodioxaphosphepine. Heating of the latter initiated an
intramolecular interaction of the P atom with the carbonyl group. Hydrolysis of the intermediate product yielded 3-hydroxy-2-oxo-2-phenyl-3-[2,2,2-trifluoro-1-hydroxy-1-(trifluoromethyl)ethyl]-2,3-di-hydro-1,2λ5-benzo[d]oxaphosphole. The reaction was highly stereoselective (PRCS/PSCR). The reaction of the starting phosphepine with chloral proceeded highly stereoselectively (PRCSCS/PSCRCR) to give a 5-carbaphosphatrane derivative containing a four-membered ring, namely, 1-phenyl-3-trichloromethyl-10,10-bis(trifluoromethyl)-6,7-benzo-2,4,8,9-tetraoxa-1λ5-phosphatricyclo[3.3.2.01,5]decene. The trigonal bipyramid of the 5-carbaphosphatrane derivative is made up of the equatorial O atoms and the apical
C atoms. 相似文献
115.
By the precision infrared spectrometry the hydration numbers n were determined for a series of acids in 0.64 M tributyl phosphate
(CCl4) and acetonitrile at a concentration of free water 0.01–0.1 M. In tributyl phosphate n = 3.1±0.3 (HAuCl4); 2.9±0.3 (HFeCl4); 1.9±0.2 (HClO4); 1.0±0.2 (HNO3); 1.0±0.1 (HCl). In acetonitrile n = 3.1±0.7 (HAuCl4); 1.1±0.4 (HFeCl4); 2.1±0.2 (HClO4), 0±0.05 (HNO3); 0.1±0.15 (HCl). 相似文献
116.
A four-component Ugi reaction was adapted for students education. To this end, a series of almost odorless aromatic isonitriles
with donor substituents was reacted with a specific carboxylic acid, phthaloyl glycine, to obtain poorly soluble (although
nicely crystallized) products. The process was performed and compared in two versions by using (1) a standard centrifuge for
parallel separation of precipitates and (2) parallel filtration with SynCore apparatus. It is shown for a broad series of
aliphatic ketones and benzyl amines that the yields are satisfactory and the products require no further purification. 相似文献
117.
E.?A.?Garibin S.?D.?Gain P.?E.?Gusev Yu.?I.?Gusev D.?V.?Leushev I.?A.?Mironov P.?A.?Rodnyi D.?M.?SeliverstovEmail author A.?N.?Smirnov 《Bulletin of the Russian Academy of Sciences: Physics》2011,75(7):1011-1014
Experimental studies on the optical properties of new crystals and ceramics based on CeF3- and CdF2-doped barium fluoride were aimed at producing scintillators with a higher light yield level (particularly in the ultra-short
wavelength range with a luminescence time of 0.6–0.8 ns) that could be used in the development of fast and low-cost optical
sensors for positron emission tomography (PET). Ceramics manufactured on the basis of BaF2 single crystals with various concentrations of Ce and Cd are transparent in the 300–600 nm wavelength range; this is comparable
to BaF2 single crystals. 相似文献
118.
A. A. Balakin A. G. Litvak V. A. Mironov S. A. Skobelev 《Journal of Experimental and Theoretical Physics》2011,112(3):504-510
The development of the spatiotemporal (filamentation) instability of a laser pulse upon excitation of a plasma wave is studied
numerically and analytically. It is shown that first, as in a medium with inertialless cubic nonlinearity, the filamentation
of radiation occurs and then filaments are attracted to each other. The following evolution differs weakly from the evolution
of a smoothed wave beam in a medium with inertial nonlinear response. 相似文献
119.
D. S. Mironov 《Thermophysics and Aeromechanics》2011,18(3):369-379
An experimental study of the flow over a single open shallow cavity is reported. Pressure fluctuations were measured using
two cavity models at free-stream Mach numbers 0.3, 0.5, and 0.6. At certain conditions, resonance of acoustic waves inside
cavity with disturbances in the shear layer over cavity was observed. Pressure fluctuation characteristics were analysed using
Fourier, wavelet, and Hilbert — Huang transforms. Those methods have allowed us to accurately examine the transition of the
flow over cavity into resonant state. 相似文献
120.
Operator product expansion (OPE) of two operators in two-dimensional conformal field theory includes a sum over Virasoro descendants of other operator with universal coefficients, dictated exclusively by properties of the Virasoro algebra and independent of choice of the particular conformal model. In the free field model, these coefficients arise only with a special “conservation” relation imposed on the three dimensions of the operators involved in OPE. We demonstrate that the coefficients for the three unconstrained dimensions arise in the free field formalism when additional Dotsenko–Fateev integrals are inserted between the positions of the two original operators in the product. If such coefficients are combined to form an n-point conformal block on Riemann sphere, one reproduces the earlier conjectured β-ensemble representation of conformal blocks. The statement can also be regarded as a relation between the 3j -symbols of the Virasoro algebra and the slightly generalized Selberg integrals IY, associated with arbitrary Young diagrams. The conformal blocks are multilinear combinations of such integrals and the AGT conjecture relates them to the Nekrasov functions which have exactly the same structure. 相似文献