Synthesis and magnetic studies of 2-(pyrazolyl)imidazoline-derived iminonitroxides and nitronylnitroxides

Sergey F. Vasilevsky, Eugene V. Tretyakov, Vladimir N. Ikorskii, Galina V. Romanenko, Sergey V. Fokin, Yurii G. Shwedenkov, Viktor I. Ovcharenko

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The reaction of formylpyrazoles 1c,g with 2,3-dimethyl-2,3-di(hydroxyamino) butane sulfate and followed by oxidation of the resulting 4,4,5,5-tetramethyl-2- (1H-pyrazolyl)imidazolidine-1,3-diols 2c,g with sodium periodate afforded 4,4,5,5-tetramethyl-2-(1H-pyrazolyl)-4,5-dihydro-1H-imidazol-3-oxide-1-oxyls 3c,g.. Reduction of 3a-h with sodium nitrite in the presence of acetic acid led to 4,4,5,5-tetramethyl-2-(1H-pyrazolyl)-4,5-dihydro-1H-imidazol-1-oxyls 4a-h. For 3b, 3c, and 4f, an anomalously large exchange coupling between the unpaired electrons of paramagnetic centers has been found.

Original languageEnglish
Pages (from-to)55-66
Number of pages12
JournalArkivoc
Volume2001
Issue number9
Publication statusPublished - 1 Dec 2001
Externally publishedYes

Fingerprint

Imidazolines
Imidazolidines
Sodium Nitrite
Exchange coupling
Acetic Acid
Oxides
Sulfates
Oxidation
Electrons
2-imidazoline
metaperiodate
butane

Keywords

  • Magnetic properties
  • Organic radicals
  • Pyrazolyliminonitroxides
  • Pyrazolylnitronylnitroxides

ASJC Scopus subject areas

  • Organic Chemistry

Cite this

Vasilevsky, S. F., Tretyakov, E. V., Ikorskii, V. N., Romanenko, G. V., Fokin, S. V., Shwedenkov, Y. G., & Ovcharenko, V. I. (2001). Synthesis and magnetic studies of 2-(pyrazolyl)imidazoline-derived iminonitroxides and nitronylnitroxides. Arkivoc, 2001(9), 55-66.

Synthesis and magnetic studies of 2-(pyrazolyl)imidazoline-derived iminonitroxides and nitronylnitroxides. / Vasilevsky, Sergey F.; Tretyakov, Eugene V.; Ikorskii, Vladimir N.; Romanenko, Galina V.; Fokin, Sergey V.; Shwedenkov, Yurii G.; Ovcharenko, Viktor I.

In: Arkivoc, Vol. 2001, No. 9, 01.12.2001, p. 55-66.

Research output: Contribution to journalArticle

Vasilevsky, SF, Tretyakov, EV, Ikorskii, VN, Romanenko, GV, Fokin, SV, Shwedenkov, YG & Ovcharenko, VI 2001, 'Synthesis and magnetic studies of 2-(pyrazolyl)imidazoline-derived iminonitroxides and nitronylnitroxides', Arkivoc, vol. 2001, no. 9, pp. 55-66.
Vasilevsky SF, Tretyakov EV, Ikorskii VN, Romanenko GV, Fokin SV, Shwedenkov YG et al. Synthesis and magnetic studies of 2-(pyrazolyl)imidazoline-derived iminonitroxides and nitronylnitroxides. Arkivoc. 2001 Dec 1;2001(9):55-66.
Vasilevsky, Sergey F. ; Tretyakov, Eugene V. ; Ikorskii, Vladimir N. ; Romanenko, Galina V. ; Fokin, Sergey V. ; Shwedenkov, Yurii G. ; Ovcharenko, Viktor I. / Synthesis and magnetic studies of 2-(pyrazolyl)imidazoline-derived iminonitroxides and nitronylnitroxides. In: Arkivoc. 2001 ; Vol. 2001, No. 9. pp. 55-66.
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