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1.
Computer processing of electronic absorption spectra of rare-earth elements in inorganic laser media
Algorithms and program modules are developed for calculation of the Judd-Ofelt parameters on modern computers. These programs can be used to perform numerical analysis of the energy absorption by rareearth ions in laser media. 相似文献
2.
5-, 2-Methylbicyclo[2.2.1]hept-2-enes, 2-methylenebicyclo[2.2.1]heptane were synthesizedby a new procedure, and their transformations in a flow system over stationary layer of aluminosilicatecatalyst were studied at various temperatures. At 150-400°C these compounds undergo isomerization which is accompanied by -migration of hydrogen. The isomerization mechanism is discussed in terms of formation of classical carbocations, not invoking nonclassical carbenium ion. 相似文献
3.
Thiophenols add to 1-vinyl-4,5,6,7-tetrahydroindole and 1-vinyl-2-phenylpyrrole in the presence of azobisisobutyronitrile to form 1-(2-arylthioethyl)pyrroles. The major products in the absence of initiator are the isomeric 1-(1-arylthioethyl)pyrrole -adducts. NH-Pyrroles inhibit the radical process and form selectively the -adducts.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 750–752, June, 1990. 相似文献
4.
Conclusions The rate constants of detachment of hydrogen from triethylsilane by radicals of rhenium and manganese pentacarbonyls, tungsten cyclopentadienyltricarbonyl, and iron eyclopentadienyldicarbonyl were determined, and the order of the reactivity of the metal carbonyls was hypothesized.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 1981–1987, September, 1986. 相似文献
5.
6.
H. Dodziuk J. Sitkowski L. Stefaniak I. G. Mursakulov I. G. Gasanov V. A. Kurbanova 《Structural chemistry》1992,3(4):269-276
Spiro[5.5]undecane,1, and its oxa analogues,2, exemplify ambiguities in the domain of chirality. Low temperature1H and13C NMR measurements of tetraoxaspiroundecanes3–5 provide an unusual opportunity for detection of largely neglected effects of the chirality of the frozen conformations of these molecules. For the trispiro compound,5, two dynamical processes are detected upon temperature lowering: cyclohexane and dioxane ring inversion. At low temperatures, it is possible to detect diastereoisomerism of5 due to the existence of three elements of chirality in the molecule.For Parts I and II see ref. [1]. 相似文献
7.
Gasanov R. G. Tumanskii B. L. Tsikalova M. V. Nuretdinov I. A. Gubskaya V. P. Zverev V. V. Fazleeva G. M. 《Russian Chemical Bulletin》2003,52(12):2675-2678
The addition of the ·But (R1) and ·P(O)(OPri)2 (R2) radicals to pyrrolidino[60]fullerenes C60CH2NMeCHX (X = C6H4N(CH2CH2Cl)2, 2,6-(But)2C6H2OH, PhC6H4, and indol-3-yl) was studied by ESR spectroscopy. The rate constants of R1 radical addition to these compounds and dimerization of spin-adducts of the R1 radicals with pyrrolidino[60]fullerenes were determined. Pyrrolidino[60]fullerenes manifest considerably higher reactivity toward the R1 radicals than fullerene C60 and methanofullerenes C60CX1X2 (X1 = X2 = CO2Et; X1 = CO2Me, X2 = OP(OMe)2, X1 = X2 = OP(OEt)2). 相似文献
8.
9.
Conditions of synthesis of N-hydroxyethyl-substituted succinimide and phthalimide by reactions of dicarboxylic acid imides with aminoethanol were optimized.Translated from Zhurnal Prikladnoi Khimii, Vol. 77, No. 12, 2004, pp. 2059–2060.Original Russian Text Copyright © 2004 by Gasanov, Allakhverdiev. 相似文献
10.
Shibkov A. A. Denisov A. A. Gasanov M. F. Zolotov A. E. Zheltov M. A. 《Crystallography Reports》2019,64(5):731-736
Crystallography Reports - It is experimentally established that the discontinuous creep of aluminum?magnesium alloy AlMg6, deformed in an aqueous medium, is accompanied by discrete... 相似文献