Search

Your search keyword '"Asfandeev, A. Yu."' showing total 2 results
Start Over Author "Asfandeev, A. Yu." Topic electron paramagnetic resonance spectroscopy
2 results on '"Asfandeev, A. Yu."'

1. Synthesis of Tetrazinyl Biradicals Containing a p-Phenylene Fragment.

Author

Kostryukov, S. G., Burtasov, А. А., Dolganov, A. V., Kozlov, A. Sh., Konushkin, I. A., Malov, N. A., Krasnov, D. A., and Asfandeev, A. Yu.

Subjects
BIRADICALS, ELECTRON paramagnetic resonance spectroscopy, CYCLIC voltammetry, ELEMENTAL analysis, PERCHLORATES
Abstract

3,3′-(1,4-Phenylene)bis[1-(4-R-phenyl)-5-phenyl-5,6-dihydro-1,2,4,5-tetrazinium] perchlorates have been transformed into stable tetrazinyl biradicals by the action of D-glucose in a slightly alkaline medium (NH4OH) in the presence of air oxygen. The tetrazinyl biradicals have been isolated in the individual state and characterized by means of cyclic voltammetry and elemental analysis as well as IR, UV, and ESR spectroscopy. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

2. Synthesis of 3-Aryl(pyridin-4-yl)-1-(4-R-phenyl)-5-phenyl-5,6-dihydro-1,2,4,5-tetrazinium Triflates and 6-Aryl(pyridin-4-yl)-4-phenyl-2-(4-R-phenyl)-1,2,3,4-tetrahydro-1,2,4,5-tetrazinyls.

Author

Kostryukov, S. G., Kozlov, A. Sh., Konushkin, I. A., Asfandeev, A. Yu., Savrasov, K. V., and Yantsen, N. V.

Subjects
ATMOSPHERIC oxygen, ELEMENTAL analysis, ELECTRON paramagnetic resonance spectroscopy, FORMALDEHYDE, ANILINE
Abstract

The corresponding formazans were synthesized by the reaction of phenylhydrazones of nitro-substituted benzaldehydes and 4-pyridinecarbaldehyde with arenediazonium salts obtained from p-substituted anilines. Formazans were converted into the corresponding 5,6-dihydro-1,2,4,5-tetrazinium triflates by the action of formalin in the presence of CF3SO3H. When tetrazinium salts were treated with D-glucose in a weakly alkaline medium (NH4OH) in the presence of atmospheric oxygen, stable tetrazinyl radicals were formed. Formazans, tetrazinium triflates, and tetrazinyl radicals were isolated in the individual state and characterized by elemental analysis, IR, UV, NMR, or ESR (radicals) spectroscopy. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results