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Browsing by Author "Il'yasov A."

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Amino-nitrile cleavage in the electrochemical reduction of hydeazones of aromatic aldehydes

Kargin Y.; Kitaeva M.; Latypova V.; Vafina A.; Zaripova R.; Il'yasov A. (1988)

1. Factors which determine the possibility of amino-nitrile cleavage of hydrazones on electrochemical reduction (ECR) include the basicity of the anionic product formed in the course of the ECR and the mobility of the ...
An electron paramagnetic resonance study of the dissociation of di-(2,4,6-triphenyl)phenyl peroxide and di-(2,4,6-triphenyl)diselenide into free radicals

Arbuzov B.; Kataeva L.; Kataev E.; Il'yasov A. (1962)

1. We have made observations on the electron paramagnetic resonance of the free radical triphenylphenoxyl. 2. For di-(2,4,6-triphenyl)phenyl diselenide, synthesized for the first time, no dissociation into free radicals ...
Anion and cation radicals of certain unsaturated compounds whose molecules contain two phosphorus atoms

Vafina A.; Il'yasov A.; Berdnikov E.; Morozova I.; Tantasheva F.; Morozov V. (1977)

1. Cation and anion radicals of unsaturated compounds whose molecules contain two phosphorus atoms have been generated electrochemically and their properties studied by ESR methods. 2. These ion radicals are π-electron ...
Determination of the effect of the medium on the thermodynamic parameters of the conformational transformations of 3-substituted 2,4-dithia-3,5-dihydro-1H-cycloocta[d,e]naphthalenes by double fitting of exchange-broadened PMR spectra

Latypov S.; Klochkov V.; Il'yasov A.; Aganov A. (1990)

The thermodynamic parameters of the conformational equilibrium for 3-substituted 2,4-dithia-3,5-dihydro-IH-cycloocta[d,e] naphthalenes in various solvents were obtained by the PMR method with temperature variation. The ...
Effect of solvent on the conformational equilibrium of 2-substituted 5,6-benz-1,3-dithiepins

Klochkov V.; Latypov S.; Yuldasheva L.; Aganov A.; Il'yasov A.; Arbuzov B. (1987)

From an analysis of the variation of1 H NMR spectra with temperature it has been shown that 2-substituted 5,6-benz-1,3-dithiepins exist in solution in the chair-e and boat-e conformations, the equilibrium between which ...
Electrochemical reduction of 1-phosphinyl-2-sulfonylethylenes and the ESR spectra of their anion radicals

Berdnikov E.; Vafina A.; Tantasheva R.; Zaripova R.; Mukhitova F.; Il'yasov A. (1981)

1. In aprotic and limitedly protogenic media, electrochemical reduction takes place with the cleavage of the C-S bond (EEC mechanism) and in protogenic media with the hydrogenation of the C=C bond (ECE mechanism). 2. The ...
Electrochemical reduction of α,β-unsaturated diphosphonium salts on a mercury electrode

Berdnikov E.; Tantasheva F.; Morozov V.; Il'yasov A.; Vafina A. (1977)

1. Study has been made of the electrochemical reduction of the salts of trans-1,2-diphosphonioethene on the dropping Hg electrode in protogenic and aprotic media. 2. It has been shown that stable radical anions result from ...
Electron transfer in nucleophilic vinyl substitution reactions involving bromovinyl sulfones

Berdnikov E.; Vafina A.; Polushina V.; Zaripova R.; Tantasheva F.; Il'yasov A. (1981)

It was shown that the reaction of phosphorous hexaalkyltriamides with β-bromovinyl aryl sulfones proceeds via the step of electron transfer with the formation of ion-radicals. © 1982 Plenum Publishing Corporation.
Influence of medium on thermodynamic parameters of conformational conversions of certain partially fixed seven-membered 1,3-heterocycles, as indicated by NMR data

Klochkov V.; Latypov S.; Il'yasov A.; Aganov A. (1990)

It has been shown that the observed differences in enthalpy and entropy between equilibrium states of seven-membered 1,3-heterocycles contained contributions from the temperature dependence of permittivity of the medium. ...
Influence of the solvent on the activation parameters of the conformational conversions of 2-substituted 1, 3-dithia-5,6-benzocycloheptenes

Latypov S.; Klochkov V.; Aganov A.; Il'yasov A.; Arbuzov B. (1989)

The enthalpy and entropy of activation of the chair(e)-boat(e) interconversion for 2-substituted 1,3-dithia-5,6-benzocycloheptenes depend significantly on the type of the solvent, whereby the changes in the enthalpy of ...
Quantitative evaluation of the effect of the medium on the thermodynamic parameters of conformational transitions of substituted 1,3-dioxanes in solutions and gases with PMR data

Latypov S.; Klochkov V.; Il'yasov A.; Aganov A. (1991)

It was shown that the reaction field model satisfactorily describes the thermodynamic parameters of conformational equilibrium of 2-acetyl-substituted 1,3-dioxanes both as a function of the properties of the solvent and ...
Spatial structure of phosphorus-containing heterocycles. 31. 2-dialkylamino-l,3,2-dioxaphosphorinanes with four-coordinated phosphorus

Arbuzov B.; Arshinova R.; Nabiullin V.; Il'yasov A.; Gubaidullin R.; Sorokina T. (1983)

1. For 2-dialkylamino-2-thiono-1,3,2-dioxaphosphorinanes, the preferred conformation is the cross with the axial position of the thiophosphoryl group. Cis-2-diethylamino-2-thiono-4-methyl-1,3,2-dioxaphosphorinane has an ...
Stereochemistry of seven-membered heterocycles Communication 16. Dipole moments, IR,1H, and13C NMR spectra, and conformations of 4-methyl-, 4-phenyl-, and isomeric 4,7-dimethyl-2,2-pentamethylene-1,3-di0xa-5,6-benzocycloheptenes

Klimovitskii E.; Sergeeva G.; Enikeev K.; Il'yasov A.; Arbuzov B. (1985)

1. 1H NMR,13C NMR, and IR spectroscopy and dipole moment measurements showed that the conformational mobility of 4-methyl-, 4-phenyl-, and trans-4,7-dimethyl-2,2-pentamethylene-1,3-dioxa-5,6-benzocycloheptenes is a consequence ...
Stereochemistry of seven-membered heterocycles. Communication 17. PMR spectra and conformation of 2-methyl-2-phenyl-1, 3-dioxa-5,6-benzocycloheptene and its isomeric 4-methyl derivatives

Arbuzov B.; Klimovitskii E.; Sergeeva G.; Strel'nik D.; Enikeev K.; Il'yasov A. (1986)

1. 2-Methyl-2-phenyl-1,3-dioxa-5,6-benzocycloheptene and its isomeric 4-methyl-substituted derivatives exist in the twist conformation. 2. In the PMR of these compounds the benzyl protons and 4-methyl groups are coupled ...
Steric structure of heterocycles containing phosphorus - 51. Conformational heterogeneity of 4,5;7,8-dibenzo-2-thiono-1,3,2-dioxaphosphocenes

Arshinova R.; Latypov S.; Gnevashev S.; Shakirov I.; Kadyrova V.; Il'yasov A. (1990)

1H and31P dynamic NMR, vibrational spectroscopy, and consideration of dipole moments have shown that 2-chloro-2-thiono-4,5;7,8-dibenzo(4,4′-dimethyl-6,6′-di-tert-butyl)-1, 3,2-dioxaphosphocene and its 2-ethoxy derivative ...
Three-dimensional structures of phosphorus-containing heterocycles 50. 2-dimethylamino-2-oxo- and -2-thiono-1,3,2-oxathiaphosphorinanes

Arbuzov B.; Arshinova R.; Bulgakova O.; Nuretdinova O.; Guseva F.; Shakirov I.; Latynov S.; Il'yasov A. (1989)

A chair conformation with an axial orientation of the phosphoryl or thiophosphoryl group is preferable for 2-dimethylamino-2-oxo- and-2-thiono-1,3,2-oxathiaphosphorinanes. The cis isomer of 2-dimethylamino-2-oxo-4-methyl ...
Water distribution in stems of Amaranthus cruentus L. examined by NMR-microtomography

Murav'eva A.; Mikheev P.; Il'yasov A.; Enikeev K.; Sitnikov A. (1996)

NMR-microtomography was applied to study the water distribution in stem tissues of Amaranthus cruentus L. at both the flower bud-formation and flowering stages. In amaranth stems, two buffer regions for water accumulation ...

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Browsing by Author "Il'yasov A."

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