Copper(II) Complexes with CF3-Substituted Spin-Labeled Pyrazoles

Copper(II) Complexes with CF3-Substituted Spin-Labeled Pyrazoles Full article

Journal

Russian Journal of Coordination Chemistry
ISSN: 1070-3284 , E-ISSN: 1608-3318

Output data

Year: 2022, Volume: 48, Number: 12, Pages: 772-783 Pages count : 12 DOI: 10.1134/s1070328422700014

Authors

Bogomyakov A.S. ¹ , Romanenko G.V. ¹ , Fokin S.V. ¹ , Chubakova E.T. ¹ , Tretyakov E.V. ² , Ovcharenko V.I. ¹

Affiliations

1	International Tomography Center, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
2	Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, 119991 Russia

CF3-substituted pyrazolyl nitroxides and their Cu(II) complexes were synthesized. The molecular and crystal structures of the products were studied by X-ray diffraction (CCDC no. 2180506–2180521). It was found that the introduction of the electron-withdrawing CF3 group into the pyrazole ring decreases the donor ability of the N atom, and nitronyl nitroxides are coordinated in heterospin complexes only by the O atoms of the nitronyl nitroxide moieties. Magnetochemical studies of polymer chain complexes [Cu(Hfac)2]n (Hfac = hexafluoroacetylacetonate anion) in the 2–300 K range revealed ferromagnetic ordering at temperatures below 5 K. Thermally induced magnetic structural phase transitions were detected in two polymorphs of the molecular complex, α-[Cu(Hfac)2] and β-[Cu(Hfac)2]. These polymorphs are new examples of molecular heterospin complexes that undergo thermally induced magnetic structural phase transitions without crystal degradation.

Bogomyakov A.S. , Romanenko G.V. , Fokin S.V. , Chubakova E.T. , Tretyakov E.V. , Ovcharenko V.I.
Copper(II) Complexes with CF3-Substituted Spin-Labeled Pyrazoles
Russian Journal of Coordination Chemistry. 2022. V.48. N12. P.772-783. DOI: 10.1134/s1070328422700014 WOS Scopus OpenAlex

Web of science:	WOS:000905946500002
Scopus:	2-s2.0-85145347829
OpenAlex:	W4313441699

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