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R. R. Shagidullin A. V. Chernova I. A. Nuretdinov G. M. Doroshkina E. V. Bayandina 《Russian Chemical Bulletin》1976,25(1):174-177
1. | Absorption bands were observed in the UV spectra of saturated selenophosphoryl compounds that were attributed to the *, n *, and n - * transitions in the selenophosphoryl group. |
2. | It was proposed to use the UV spectroscopy method to study the seleno-selenol isomerism in organophosphorus compounds. |
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A. V. Chernova G. M. Doroshkina R. R. Shagidullin B. E. Abolonin 《Russian Chemical Bulletin》1990,39(4):846-848
Short-wavelength nSe * and long-wavelength nSe * bands are observed in the UV spectra of saturated trialkylarsine selenides in the near-UV region. The nx * band in going from arsine selenides to arsine sulfide and then to arsine oxides is shifted hypsochromically, as in the corresponding phosphorus compounds. The nx * band is only slightly sensitive to the chalcogen. Saturated trialkylarsines, in contrast to alkylphosphines, absorb in the near UV region (the nAs * band is at 208 nm).Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 940–942, April, 1990. 相似文献
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V. A. Mamedov V. N. Valeeva L. A. Antokhina G. M. Doroshkina A. V. Chernova I. A. Nuretdinov 《Chemistry of Heterocyclic Compounds》1993,29(5):607-611
The methyl ester and N,N-diethylamide of 2-azido-5-phenyl-4-thiazolecarboxylic acid were obtained by the reaction of the corresponding 4-substituted 2-hydrazino-5-phenylthiazole with NaNO2 in acid media. IR and UV spectroscopy were used to show that the compounds synthesized retain azide form in both the crystalline state and in solution. The reaction of azides with dicarbonyl compounds gave derivatives of 2-[5-methyl-4-acetyl-or 2-[5-methyl-4-ethoxycarbonyl-1,2,3-triazol-1-yl]-5-phenylthiazole-4-carboxylic acid.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 710–714, May, 1993. 相似文献
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R. Kh. Giniyatullin A. S. Mikhailov V. E. Semenov V. D. Akamsin V. S. Reznik A. V. Chernova G. M. Doroshkina A. A. Nafikova Sh. K. Latypov Yu. Ya. Efremov D. R. Sharafutdinova A. T. Gubaidullin I. A. Litvinov 《Russian Chemical Bulletin》2003,52(7):1595-1599
The reactions of 1,3-bis(-bromobutyl- or -pentyl)-6-methyluracil with 1,3-bis(-ethylaminobutyl- or -pentyl)-6-methyluracil afforded pyrimidinophanes containing N atoms in bridging polymethylene chains. Individual geometric isomers of pyrimidinophanes were isolated. The structure of one of these isomers was established by X-ray diffraction analysis. Quaternization of the bridging N atoms with o-nitrobenzyl bromide gave rise to water-soluble pyrimidinophanes. 相似文献
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Shagidullin R. R. Chernova A. V. Doroshkina G. M. Kataev V. E. Bazhanova Z. G. Katsyuba S. A. Reznik V. S. Mikhailov A. S. Giniyatullin R. Kh. Pashkurov N. G. Efremov Yu. Ya. Nafikova A. A. 《Russian Journal of General Chemistry》2002,72(10):1625-1632
A new macrocycle including pyrimidine fragments, 12,23,36-trimethyl-24,40-dioxo-15,33-dithia-2,9,13,22,26,35,38,39-octaazatetracyclo[32.3.1.110,14.122,26]tetraconta-1(38),10(39),11,13,23,34,36-heptaene, was synthesized. According to the data of IR and UV spectroscopy and HF/6-31G** quantum-chemical calculations, macrocyclic compounds of this series in crystal exist in the amino form, one NH group of which is likely to be involved in intramolecular hydrogen bond, and the other, in intermolacular hydrogen bond. The strength of the latter depends on the macroring size. In solution, the above structures are supplemented by conformers containing both intramolecularly H-bonded and free amino groups, predominantly with trans structure of the HÄNÄCÍN fragment. The imino form of the aminopyrimidine moieties is hardly probable. 相似文献
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V. A. Mamedov V. N. Valeeva L. A. Antokhina A. V. Chernova R. R. Shagidullin G. M. Doroshkina I. A. Nuretdinov 《Russian Chemical Bulletin》1994,43(8):1368-1372
Esters and amides of 2,2-dichloro-3-(2-furyl)-3-hydroxypropionic acid were prepared by the reaction of furfural with dichloroacetic acid derivatives under the conditions of the Darzens condensation. The structures of the reaction products were confirmed by their1H NMR and IR spectra and chemical transformations.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1444–1448, August, 1994. 相似文献
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