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排序方式: 共有139条查询结果,搜索用时 15 毫秒
1.
B. L. Tumanskii A. A. Kadyrov O. A. Popova L. T. Lantseva N. N. Bubnov S. P. Solodovnikov K. N. Makarov 《Russian Chemical Bulletin》1991,40(5):903-907
The EPR method was used to study the structure of spin adducts of silyl and phosphonyl radicals with higher internal perfluoroalkenes. The capacity for spin adducts to split off hydrogen atoms is determined by the degree of steric screening of the free radical center. The preparative photochemical reaction of hydrosilanes and dialkyl phosphites with perfluoro-4-methylpent-2-ene leads to regiospecific hydrosilylation and hydrophosphorylation products with yields up to 80%.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 5, pp. 1018–1023, May, 1991. 相似文献
2.
V. F. Cherstkov É. A. Avetisyan B. L. Tumanskii S. R. Sterlin N. N. Bubnov L. S. German 《Russian Chemical Bulletin》1990,39(10):2223-2223
Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 10, pp. 2450–2451, October, 1990. 相似文献
3.
4.
B. L. Tumanskii V. V. Bashilov N. N. Bubnov S. P. Solodovnikov V. I. Sokolov 《Russian Chemical Bulletin》1994,43(5):884-886
Using ESR spectroscopy, the reaction of P(O)(OPri)2 phosphoryl radicals with C60ML2 (M=Pd, Pt) was studied and the spin-adducts formed were shown to be unstable under the reaction conditions. The 5-addition of Pt(PPh3)4 to the dimer of phosphorylfullerenyl radicals results in metal-containing dimers (RO)2(O)PL2MC60-C60ML2P(O)(OR)2, which dissociate when exposed to visible light to afford C60ML2P(O)(OR)2 radicals; ML2 in these complexes is located in different positions in relation to the radical center. As a result, the ESR spectra contain the superposition of at least five signals of radicals that differ in HFS constants andg-factors.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 938–940, May, 1994.The present work was supported by the Russian Foundation for Basic Research (Projects 93-03-18725 and 93-03-4101). 相似文献
5.
6.
B. L. Tumanskii 《Russian Chemical Bulletin》1996,45(10):2267-2278
The results of ESR spectroscopic studies of radical reactions of fullerenes are presented. Reactivities of radicals of various chemical natures with respect to C60 and C70, delocalization of the unpaired electron in monofullerenyl radicals, and their reactivity are considered. The examples of dynamic effects in the ESR spectra of fullerenyl radicals, associated with the hindered rotation of the attached radicals, are presented. Characteristic features of the structures of the spin adducts resulting from polyaddition of free radicals to fullerenes and of fullerenyl radicals containing 2-bonded metaIloco mplexes are discussed.Translated fromIzvestiya Akademii Nauk, Seriya Khimicheskaya, No. 10, pp. 2396–2406, October, 1996. 相似文献
7.
8.
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
9.
Solodovnikov S. P. Tumanskii B. L. Bashilov V. V. Lebedkin S. F. Sokolov V. I. 《Russian Chemical Bulletin》2002,51(6):1009-1014
The ESR spectra of the products of oxidation of solutions and powders of Y@C82 and La@C82 with fuming sulfuric acid were studied. Based on the oxidation conditions and the sequence of spectral patterns, the spectra were attributed to the radical cations M@C82
n+ (n = 2, 4), dimers M3+
2@C164
+, and polyendometallofullerenes. 相似文献
10.
L. N. Novikova N. A. Ustynyuk B. L. Tumanskii P. V. Petrovskii A. A. Borisenko S. V. Kukharenko V. V. Strelets 《Russian Chemical Bulletin》1995,44(7):1306-1310
The oxidation of the carbon-centered [(6-C13H9)Cr(CO)3]– anion (1
–) results in formation of (-6:6-9,9-bifluorenyl)bis-chromiumtricarbonyl (3) due to coupling of the intermediate carbon-centered radical (1.). The oxidation of the metal-centered anion [(5-C13H9)Cr(CO)3]– (2
–), which is isomeric to the 1– anion, gives an equilibrium mixture of the chromium-centered radical {(5-C13H9)Cr(CO)3}. (2
.) and its dimer [(5-C13H9)Cr(CO)3]2 (6). Radical2
. readily reacts with MeI and the solvent (THF); the resulting derivatives, (5-C13H9)Cr(CO)3R (R=Me (10); R=H (7)), undergo fast ricochet inter-ring 56 rearrangements into (6-9R-C13H9)Cr(CO)3 (R=CH3 (9); R=H (4)).Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 7, pp. 1354–1358, July, 1995.The authors are grateful to D. V. Zagorevskii who recorded the mass spectra. This study was financially supported by the Russian Foundation for Basic Research (Grant No. 94-03-05209) and the International Science Foundation (Grant Nos. MQ 4000 and REV 000). 相似文献