Zobrazeno 1 - 10
of 15
pro vyhledávání: '"A. Z. Yankelevich"'
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 34:247-251
The chemically induced dynamic neclear polarization (CIDNP) method showed that the photodissociation of 4-benzoyl-4-phenyl-1,3-dioxolane takes place according to a Norrish type I mechanism from the triplet excited electron state. Reactions involving
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::201877b7168f192b27cf4ddde0ebb32e
https://doi.org/10.1007/bf00951262
https://doi.org/10.1007/bf00951262
Autor:
Anatolii L Buchachenko, A. Z. Yankelevich, A. D. Pershin, H. J. Hagemann, V. K. Potapov, V. K. Kuznets
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 31:460-466
1. We have detected and investigated chemical polarization of protons and carbon nuclei in photochemical reactions ofα-hydroxyketones. 2. On the basis of CPN, we have formulated a mechanism for the radical photoconversions of ketones.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0463030dccedd3014917a79408744914
https://doi.org/10.1007/bf00949760
https://doi.org/10.1007/bf00949760
Autor:
V. M. Kuznets, G. A. Val'kova, N. N. Shapet'ko, Anatolii L Buchachenko, A. Z. Yankelevich, D. N. Shigorin
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 27:52-57
1. The photochemical reaction of p-benzoquinone with i-C3H7OH in CCl4 proceeds along two different paths, the initial act being the detachment of an H atom from theα- C atom of the alcohol by the triplet quinone, in the one (a), and acceptance of an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3492f5ffd29fbbc52231f2070e81f6cb
https://doi.org/10.1007/bf01153207
https://doi.org/10.1007/bf01153207
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 29:1919-1924
1. Using the methods of laser photolysis and CIDNP the mechanism of the photoreduction of 2,6-diphenyl-1,4-benzoquinone by diphenylamine has been established and the kinetics and spectral characteristics of the short-lived intermediate products forme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::889e747b452523fc188111dea42adac6
https://doi.org/10.1007/bf00949657
https://doi.org/10.1007/bf00949657
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 38:2456-2459
Polarization of nuclei in both the products of the reactions and in the CHD2OD proton without polarization in the CH3OH protons is observed in irradiation of a solution of acetone in CD3OD in the presence of CHD2OD and CH3OH. Polarization of the prot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::180c3fa37feedab09034177d9811b3f1
https://doi.org/10.1007/bf00962423
https://doi.org/10.1007/bf00962423
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 38:18-23
1. Restriction of molecular mobility by increasing the viscosity of the medium or including a radical pair (RP) in a micelle is manifested by a significant increase in the polarization amplification factors in comparison to polarization in the same s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd88d79856ffd788f0a366196654c6d3
https://doi.org/10.1007/bf00953691
https://doi.org/10.1007/bf00953691
Autor:
B. D. Sviridov, V. V. Ershov, Kh. I. Khageman, G. A. Nikiforov, C. R. H. I. De Jonge, A. Z. Yankelevich, V. M. Kuznets
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 28:1167-1173
1. CNP methods have been used to study the photoreduction of 2,6-dimethyl- and 2,6-diphenyl-1,4-benzoquinones in aliphatic alcohols; a mechanism covering the photolysis has been advanced, and its validity confirmed. 2. The character of the primary ra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::794ff6f0d938e9543569efff49e428cd
https://doi.org/10.1007/bf00947377
https://doi.org/10.1007/bf00947377
Autor:
G. A. Val'kova, N. N. Shapet'ko, Anatolii L Buchachenko, A. Z. Yankelevich, D. N. Shigorin, V. M. Kuznets
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 26:704-708
1. The photoreduction of p-benzoquinione by ethyl and isopropyl alcohols proceeds through the triplet quinone state. 2. The-unstable products from the alcohol oxidation (vinyl alcohol and the enol acetone) result from disproportionation of the [p-HOC
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4cfb0a9cadd766ed51c88b0aa1b586fa
https://doi.org/10.1007/bf01108185
https://doi.org/10.1007/bf01108185
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 35:2457-2461
It has been established by kinetic and spectral methods that the cyclohexadiene carbene generated in the photolysis of 2,6-di-tert-butyl-1,4-benzoquinone diazide in benzene predominantly in the singlet state reacts with benzene to form a norcaradiene
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6a5eab51c0b08247ad8114715122908
https://doi.org/10.1007/bf01474197
https://doi.org/10.1007/bf01474197
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 32:927-934
1. 1H and13C NMR spectroscopy was used to study the photoconversion of methyl n-propyl ketone, methyl benzyl ketone, and methyl adamantyl ketone. The13C and1H CIDNP signs indicated that the polarization arises upon the cleavage of excited ketones in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e27ebf86f762cd274c12acdd56bc7c8
https://doi.org/10.1007/bf00956141
https://doi.org/10.1007/bf00956141