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991.
J. C. Lpez V. A. L. Rivera Yu. F. Smirnov A. Frank 《International journal of quantum chemistry》2002,88(2):280-295
The calculation of Franck–Condon factors between different 1‐D Morse potential eigenstates using a formula derived from the Wigner function is discussed. Our numerical calculations using a simple program written in Mathematica are compared with other calculations. We show that our results have a similar accuracy as those calculations performed with more sophisticated methods. We discuss the extension of our method to include non‐Condon effects in the calculation. © 2002 Wiley Periodicals, Inc. Int J Quantum Chem 88: 280–295, 2002 相似文献
992.
T. P. Surikova V. D. Zakharova S. S. Mochalov Yu. S. Shabarov 《Chemistry of Heterocyclic Compounds》1988,24(8):860-864
A number of cyclopropyl-substituted crotononitriles have been synthesized by a Knoevenagel condensation. Reaction of these compounds with sulfur in the presence of a base gives substituted 4-cyclopropyl- and 4-cyclopropylphenyl-2-aminothiophenes, while nitration of some acetylaminothiophenes with acetyl nitrate in acetic anhydride at low temperature gives the corresponding nitro derivatives.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1045–1049, August, 1988. 相似文献
993.
994.
Solov'ev A. Yu. Ryadnova I. Yu. Shataeva L. K. 《Russian Journal of Applied Chemistry》2002,75(9):1453-1457
Sorption of poly(ethylene glycol) on poly(ethylene terephthalate) track membranes was studied at different pH. The hydrophilic-hydrophobic properties of the intact membranes and those modified with poly(ethylene glycol) are compared. The membrane-aqueous human serum albumin and membrane-aqueous insulin adhesive tensions were determined for modified membranes. The competitive sorption of human serum albumin and poly(ethylene glycol) from aqueous solution on the track membranes is analyzed. 相似文献
995.
Balashov A. L. Danov S. M. Krasnov V. L. Chernov A. Yu. Ryabova T. A. 《Russian Journal of General Chemistry》2002,72(5):744-747
In the neutral systems formaldehyde-water-alcohol (methanol, ethanol, ethylene glycol) at 25°C, formaldehyde is preferentially present as hemiacetals. The mean equilibrium constants of step polycondensation of formaldehyde are calculated. 相似文献
996.
E. V. Chubarova D. G. Samsonenko H. G. Platas F. M. Dolgushin A. V. Gerasimenko M. N. Sokolov Z. A. Starikova M. Yu. Antipin V. P. Fedin 《Journal of Structural Chemistry》2004,45(6):1004-1013
Compounds of trigonal cluster chloroaqua complexes with cucurbit[8]uril were synthesized by slowly evaporating HCl solutions of chalcogenides heterometallic cubane cluster complexes of molybdenum and tungsten with cucurbit[8]uril in air; the complexes were characterized by X-ray diffraction analysis: (H3O)8[Mo3S4(H2O)2.5Cl6.5]2Cl(PdCl4)·(C48H48N32O16)· 29H2O (a = 13.3183(17) Å, b = 13.7104(18) Å, c = 18.225(3) Å; α = 80.263(3)°, β = 77. 958(3)°, γ = 87.149(4)°, V = 3207.4(7) Å3, space group P
, Z = 1, ρ(calc) = 1.900 g/cm3), (H3O)4 [Mo3S4(H2O)3Cl6]2·(C48H48N32O16)3·68H2O (a = 21.413(6) Å, c = 49.832(10) Å; γ = 120°, V = 19788(8) Å3, space group R
, Z = 3, ρ(calc) = 1.695 g/cm3), (H3O)6 [Mo3S4(H2O)3Cl6]2Cl2·(C48H48N32O16)·12H2O (a = 15.881(2) Å, b = 17.191(2) Å, c = 23.276(4) Å; β = 98.865(15)°, V = 6278.7(15) Å3, space group P21/c, Z = 2, ρ(calc) = 1.638 g/cm3), [W3S4(H2O)5Cl4]2·(C48H48N32O16)3·35H2O (a = 21.038(3) Å; α = 61.20(1)°, V = 6762.0(14) Å3, space group R
, Z = 1, ρ(calc) = 1.582 g/cm3). The [Mo3S4(H2O)3Cl6]2− anion complex was isolated as three geometrical isomers.Original Russian Text Copyright © 2004 by E. V. Chubarova, D. G. Samsonenko, H. G. Platas, F. M. Dolgushin, A. V. Gerasimenko, M. N. Sokolov, Z. A. Starikova, M. Yu. Antipin, and V. P. Fedin__________Translated from Zhurnal Strukturnoi Khimii, Vol. 45, No. 6, pp. 1049–1058, November–December, 2004. 相似文献
997.
Stolyarov I. P. Gaugash Yu. V. Kryukova G. N. Kochubei D. I. Vargaftik M. N. Moiseev I. I. 《Russian Chemical Bulletin》2004,53(6):1194-1199
The reduction of palladium(ii) carboxylates Pd3(OCOR)6 (R = Me, Et, CHMe2, CMe3) with hydrogen in alcohol solutions containing 1,10-phenanthroline (phen) and subsequent oxidation with oxygen gave new palladium nanoclusters, mainly particles with a nearly spherical metal core and an average size of 18 . Based on elemental analysis, NMR, X-ray photoelectron spectroscopy, and EXAFS, nanoclusters were described by the idealized formula Pd147phen32O60(OCOR)30. The specimens contained up to 25% smaller 55-atomic Pd clusters with a 10 metal core. New nanoclusters catalyze hydrogenation of alkynes and alkenes, reduction of nitriles with formic acid, oxidation of aliphatic and benzylic alcohols, oxidative esterification of ethylene and propylene, and disproportionation of benzyl alcohol into toluene and benzaldehyde. 相似文献
998.
E. M. Suleimenov F. M. Smagulova O. V. Morozova V. A. Raldugin I. Yu. Bagryanskaya Yu. V. Gatilov V. I. Yamovoi S. M. Adekenov 《Chemistry of Natural Compounds》2005,41(6):689-691
The five known lactones matricarin, austricin, canin, and achillin guaianolides and argolide germacranolide and the two flavonoids
eupatilin and its 7-O-methyl ester were isolated for the first time from the aerial part of Artemisia albida Willd. The structure of eupatilin was confirmed by an x-ray structure analysis.
__________
Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 568–570, November–December, 2005. 相似文献
999.
Yu. V. Fedorov O. A. Fedorova N. E. Shepel’ S. P. Gromov M. V. Alfimov L. G. Kuz’mina J. A. K. Howard J. Saltiel 《Russian Chemical Bulletin》2005,54(9):2119-2128
Benzobisthiazole-based bis(crown ether) was synthesized and its complexation with alkali and alkaline earth cations was studied.
Photochemical transformations of the free ligand and its complexes with alkaline earth cations involve E,Z-photoisomerization and [2+2] photocycloaddition.
Dedicated to Academician N. S. Zefirov on the occasion of his 70th birthday.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 2056–2065, September, 2005. 相似文献
1000.
S. V. Chernov E. E. Shul’ts M. M. Shakirov I. Yu. Bagryanskaya Yu. V. Gatilov G. A. Tolstikov 《Russian Journal of Organic Chemistry》2005,41(4):535-545
Oxidation of lambertianic acid methyl ester and methyl 15,16-epoxy-17-hydroxylabda-13(16)14-dien-18-oate gave 17-nor-8-oxo-, 8,12-epoxy-17-hydroxy-, and 8-formyl-17-norlabdadienoic acid esters which were subjected to reductive amination, and the subsequent intramolecular aminomethylation of 17-nor-8(R)-methylamino- and 17-methylaminolabdadienoates with formaldehyde afforded new polycyclic compounds, furoazocine and furoazonine derivatives.__________Translated from Zhurnal Organicheskoi Khimii, Vol. 41, No. 4, 2005, pp. 547–556.Original Russian Text Copyright © 2005 by Chernov, Shul’ts, Shakirov, Bagryanskaya, Gatilov, Tolstikov.For communication VIII, see [1]. 相似文献