Cu(hfac)2 Complexes with N-tert-Butyl-N-(1-alkyl-1H-pyrazole-5-yl)Hydroxylamines

Cu(hfac)2 Complexes with N-tert-Butyl-N-(1-alkyl-1H-pyrazole-5-yl)Hydroxylamines Full article

Journal

Journal of Structural Chemistry (Журнал структурной химии)
ISSN: 0022-4766

Output data

Year: 2025, Volume: 66, Number: 12, Pages: 2612-2624 Pages count : 13 DOI: 10.1134/s0022476625120145

Authors

Golomolzina I.V. ¹ , Tolstikov S.E. ¹ , Letyagin G.A. ¹ , Bogomyakov A.S. ¹ , Akyeva A.Ya. ² , Syroeshkin M.A. ² , Romanenko G.V. ¹

Affiliations

1	International Tomography Center, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2	Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, Russia

The series of H5R N-tert-butyl-N-(1-alkyl-1H-pyrazole-5-yl)hydroxylamines (R = Me, iPr, nBu) (diamagnetic precursors of N5R 5-R-pyrazolyl-substituted tert-butylnitroxides) is expanded. It is established that the interaction of H5R with the copper(II) hexafluoroacetylacetonate Cu(hfac)2 leads to the formation of individual mononuclear complexes and their cocrystals with H5R. In the complexes, H5R are coordinated in a monodentate mode via an N atom of the pyrazole ring, and the OH groups form intermolecular hydrogen bonds. It is shown by cyclic voltammetry that the peak at 720-750 mV corresponding to one-electron H5R oxidation has a reduction response wave with a noticeably lower current, meaning that the process is partially reversible. Due to low values of potentials, the interaction with Cu(hfac)2 in the solution can lead to the oxidation of H5R by air oxygen and to the formation of complexes containing both H5R and N5R as ligands, thus allowing one to use the “one-pot” approach to prepare heterospin complexes with tert-butylnitroxides.

Golomolzina I.V. , Tolstikov S.E. , Letyagin G.A. , Bogomyakov A.S. , Akyeva A.Y. , Syroeshkin M.A. , Romanenko G.V.
Cu(hfac)2 Complexes with N-tert-Butyl-N-(1-alkyl-1H-pyrazole-5-yl)Hydroxylamines
Journal of Structural Chemistry (Журнал структурной химии). 2025. V.66. N12. P.2612-2624. DOI: 10.1134/s0022476625120145 WOS OpenAlex

Голомолзина И.В. , Толстиков С.Е. , Летягин Г.А. , Богомяков А.С. , Акыева А.Я. , Сыроешкин М.А. , Романенко Г.В.
Комплексы Cu(hfac)2 с N-трет-бутил-N-(1-алкил-1H-пиразол-5-ил)гидроксиламинами
Journal of Structural Chemistry (Журнал структурной химии). 2025. Т.66. №12. 157921 :1-14. DOI: 10.26902/jsc_id157921

Submitted:	Oct 17, 2025
Accepted:	Oct 21, 2025
Published print:	Jan 10, 2026

Web of science:	WOS:001659042800006
OpenAlex:	W7121536494

Пока нет цитирований