Zobrazeno 1 - 10
of 43
pro vyhledávání: '"L. A. Es'kova"'
Autor:
O. V. Lebedeva, R. G. Sultangareev, L. A. Es'kova, Yu. N. Pozhidaev, N. S. Shaglaeva, S. S. Bochkareva
Publikováno v:
Russian Journal of Physical Chemistry A. 81:335-338
Hybrid organoinorganic composites insoluble in water and organic solvents were prepared by the hydrolysis of tetraethoxysilane in the presence of poly-1-vinylpyrazole, poly-1-vinylimidazole, and poly-4-vinylpyridine. The composition of the composites
Autor:
Tamara N. Aksamentova, L. A. Es'kova, V. K. Turchaninov, V. A. Lopyrev, A. M. Shulunova, A. I. Vokin, Valentina N. Elokhina
Publikováno v:
Russian Journal of General Chemistry. 71:137-142
The effect of nonspecific solvation on the long-wave absorption band in the UV spectra of isomeric nitropyrazoles was studied. The aprotic inert and aprotic protophilic solvents exert different spectroscopic effects. In the former solvents, the solva
Publikováno v:
Bulletin of the Russian Academy of Sciences Division of Chemical Science. 41:1462-1465
It was found that vinylpyrazoles react with thiols both according to ionic and according to free-radical mechanisms, with the formation of products of α- and β-addition. Radical thiylation of 1-vinylpyrazoles is a convenient method of synthesis of
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 40:2181-2184
Use of the single particle Green's function in semiempirical calculations (AM-1) of the ionization energies of nitroazoles provides satisfactory agreement with photoelectron spectroscopy data.
Autor:
B. V. Trzhtsinskaya, Alexander V. Vashchenko, E. S. Domnina, A. V. Afonin, V. K. Voronov, L. V. Baikalova, E. I. Enikeeva, L. A. Es'kova
Publikováno v:
Chemistry of Heterocyclic Compounds. 27:845-848
The factors that affect the chemical shifts in the 15N NMR spectra of N-vinylazoles were investigated. It was shown that an additional positive contribution to the shielding constant of the “pyridine” nitrogen atom occurs in the s-cis-(N(2)) conf
Publikováno v:
Chemistry of Heterocyclic Compounds. 26:1121-1125
A quantitative evaluation of the percentages of rotational isomers of 1-vinylpyrazoles and 1-vinylimidazoles was made on the basis of an analysis of the 1H and 13C NMR spectral parameters and quantum-chemical calculations. It is shown that the popula
Autor:
L. A. Es'kova, Al'bina I. Mikhaleva, Lyubov N. Sobenina, Trofimov Boris A, Nikolay S. Zefirov, D.‐S. D. Toryashinova, A. I. Albanov
Publikováno v:
ChemInform. 31
Autor:
L. A. Es'kova, O. V. Lebedeva, G. A. Pirogova, A. K. Khaliullin, E. P. Petrova, R. G. Sultangareev, N. S. Shaglaeva
Publikováno v:
Russian Journal of Applied Chemistry. 75:673-674
Copolymerization of vinyl chloride with 1-vinylpyrazole was studied. The copolymerization constants were determined. The chemical structure of the copolymers was studied by NMR and IR spectroscopy.
Publikováno v:
Gigiena i sanitariia. (6)
Publikováno v:
ChemInform. 21