排序方式: 共有64条查询结果,搜索用时 15 毫秒
21.
A. V. Shevtsov V. Yu. Petukhova S. A. Kutepov V. V. Kuznetsov N. N. Makhova N. E. Kuz'mina G. G. Aleksandrov 《Russian Chemical Bulletin》2000,49(11):1882-1886
A series of complexes ofN-(2-aminoethyl)diaziridines with transition metal salts (Zn2+, Cd2+, Ni2+, Co2+, Mn2+, or Fe2+) were synthesized. Their structures were established by IR and NMR spectroscopy. The structure of bis[1,2-bis(2-aminoethyl)diaziridine]cadmium(II)
diperehlorate was confirmed by X-ray diffraction analysis.
Published inIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 1910–1914, November, 2000. 相似文献
22.
V. S. Savostin I. I. Krylov A. P. Kutepov A. I. Rapkin A. V. Fokin 《Russian Chemical Bulletin》1990,39(6):1294-1295
The reaction of tetrafluoroethylene and trifluorochloroethylene with a mixture of nitric and fluorosulfonic acids gives - nitrotetrafluoroethyl fluorosulfate and a mixture of regioisomers of - nitrochlorotrifluoroethyl fluorosulfate, respectively.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, p. 1432, June, 1990. 相似文献
23.
Odinokov V. N. Spivak A. Yu. Emel"yanova G. A. Kutepov B. I. 《Russian Chemical Bulletin》2002,51(3):526-530
The reactions of trimethylhydroquinone with isoprenoid allylic alcohols catalyzed by a Pentasil type zeolite in the H-form gave trimethyl-1,4-benzoquinones with the corresponding isoprenoid group, which were subsequently transformed into the target 3-chromenes on treatment with pyridine. Partial ozonolysis of chromenes proceeded selectively at the -bond of the side chain, resulting in the corresponding chromenes with an -carbonyl group. 相似文献
24.
A. A. Tantseva A. N. Khazipova G. F. Garieva B. I. Kutepov 《Russian Journal of Applied Chemistry》2010,83(12):2100-2105
The effect exerted by temperature of steam treatment and degree of exchange of Na+ for H+ on the lattice parameters and texture of Y zeolites with the initial SiO2/Al2O3 ratio 4.9 and 6.0 was determined. 相似文献
25.
Ilyn AP Trifilenkov AS Kuzovkova JA Kutepov SA Nikitin AV Ivachtchenko AV 《The Journal of organic chemistry》2005,70(4):1478-1481
[reaction: see text] We present a convenient synthesis of novel heterocyclic structures containing pyrrolo[1,2-a][1,4]diazepine fragment using a novel modification of four-component Ugi condensation. We demonstrate the usefulness and versatility of the developed approach for the synthesis of variously substituted compounds and discuss the scope and limitations of the chemistry involved. 相似文献
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27.
A.A. Kutepov D.G. Hummer C.Bradley Moore 《Journal of Quantitative Spectroscopy & Radiative Transfer》1985,34(2):101-114
Accurate numerical solutions have been obtained for a model problem of rotational relaxation within the 0001 vibrational level of C12O216 accounting for the transfer of radiation in the lines of the fundamental transition 0001-0000 of the 4.3-μm band. Intramolecular exchange of vibrational energy with the reservoir of v2 quanta and absorption of solar radiation in the 0001- 0000 band are accounted for. A plane-parallel isothermal atmosphere of pure CO2 with the barometric pressure distribution and solar illumination is assumed. The line opacity is represented by nonoverlapping Voigt profiles depending on temperature and pressure. The transfer problem, which is equivalent to that of a multiplet with a large number of lines with a common lower level, was solved by a generalization of the Rybicki method. We find significant deviations from ratational LTE (local thermodynamic equilibrium) in regions in which the harmonic average of the optical depth over the band is of order 103-104. Absorption of solar radiation can affect significantly the source functions of lines at the centers of the P and R branches. Deviations from rotational LTE are shown to influence the intensity and shape of the 4.3-μm band of CO2 in the spectra of Mars and Venus, and should be taken into account in the interpretation of the observations in which the rotational structure is resolved, especially in limb measurements, where these effects are particularly apparent. 相似文献
28.
V.A. Krysko J. Awrejcewicz I.E. Kutepov N.A. Zagniboroda I.V. Papkova A.V. Serebryakov A.V. Krysko 《Physics letters. A》2013,377(34-36):2058-2061
The Euler–Bernoulli kinematic model as well as the von Kármán geometric non-linearity are used to derive the PDEs governing flexible beam vibrations. The beam is embedded into a 2D temperature field, and its surface is subjected to action of the electric potential. We report how an increase of the exciting load amplitude yields the beam turbulent behavior, and how the temperature changes a scenario from a regular/laminar to spatio-temporal/turbulent dynamics. Both classical Fourier analysis and Morlet wavelets are used to monitor a strong influence of temperature on regular and chaotic beam dynamics. 相似文献
29.
N.G. Grigorieva S.A. Kostyleva S.V. Bubennov V.R. Bikbaeva A.R. Gataulin N.A. Filippova A.N. Khazipova T.R. Prosochkina B.I. Kutepov Narender Nama 《Journal of Saudi Chemical Society》2019,23(4):452-460
High activity and selectivity of the hierarchical H-Ymmm zeolite in the synthesis of practically important pyridines (by interaction of C2–C4 alcohols with formaldehyde and ammonia, cyclocondensation of acetaldehyde and propanal with ammonia), dialkyl quinolines (by reaction of aniline with aldehydes) and alkyl dihydroquinolines (by reaction of aniline with ketones- acetone, acetophenone) were revealed in the research.The advantages of the micro-meso-macroporous H-Ymmm zeolite over the microporous H-Y zeolite in the synthesis of pyridines and quinolines were demonstrated. In the products formed by the reaction of ethanol with formaldehyde and ammonia, picolines (up to 63%) and lutidine are predominant in H-Ymmm, Pb-H-Ymmm and Fe-H-Ymmm zeolites. The interaction of n-propanol (n-butanol) with formaldehyde and ammonia in the presence of H-Ymmm zeolite with high selectivity produced 3,5-lutidine (up to 90%) or 3,5-diethylpyridine (85%). H-Ymmm zeolite makes it possible to prepare 2-methyl-5-ethylpyridine with 87% selectivity (reaction of acetaldehyde with ammonia) and 2-ethyl-3,5-dimethylpyridine with 58% selectivity (reaction of propanal with ammonia).The synthesis of dialkylquinolines and dialkyltetrahydroquinolines with a total selectivity of 65–73% by the interaction of aniline with C3–C5 aldehydes has been carried out. The dihydroquinoline derivatives with the selectivity of up to 70% have been synthesized by the reaction of aniline with ketones (acetone, acetophenone). 相似文献
30.