Co(II) Complexes with CF3 Derivatives of Pyrazolyl Substituted Nitronilnitroxyls

IF 1.2 4区化学 Q4 CHEMISTRY, INORGANIC & NUCLEAR

Journal of Structural Chemistry Pub Date : 2025-02-12 DOI:10.1134/S0022476625010056

S. V. Fokin, G. V. Romanenko, K. A. Smirnova, A. S. Bogomyakov, A. A. Serykh, E. V. Tretyakov

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Abstract

Structures of new heterospin cobalt(II) hexafluoroacetylacetonate complexes (Co(hfac)₂) with stable nitronylnitroxyl radicals containing 1-methyl-3-trifluoromethyl- (L¹), 1-ethyl-3-trifluoromethyl- (L²), or 1-ethyl-5-trifluoromethylpyrazol-4-yl substituents (L³) are considered. It is shown that the interaction of Co(hfac)₂ with L¹ and L² yields a new type of heterospin complexes with the [Co(hfac)₂(L)₂] stoichiometry, where L is coordinated by the oxygen atom of the nitronyl nitroxide fragment. The interaction with L³ yields a dimeric complex [Co(hfac)₂(L³)]₂ with paramagnetic ligands performing a bidentate-bridging function due to the coordination of imine N atoms of the pyrazole ring and O atoms of the paramagnetic moiety. Magnetic behavior of [Co(hfac)₂(L)₂] complexes indicates an antiferromagnetic interaction between the cobalt ion and coordinated nitronyl-nitroxide groups.

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来源期刊

Journal of Structural Chemistry 化学-无机化学与核化学

CiteScore

1.60

自引率

12.50%

发文量

142

审稿时长

8.3 months

期刊介绍： Journal is an interdisciplinary publication covering all aspects of structural chemistry, including the theory of molecular structure and chemical bond; the use of physical methods to study the electronic and spatial structure of chemical species; structural features of liquids, solutions, surfaces, supramolecular systems, nano- and solid materials; and the crystal structure of solids.