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Three Novel Cyclic Zn(II)–Nitronyl Nitroxide Radical Complexes: Synthesis, Crystal Structures, and Properties

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Abstract

Using two flexible and functional nitronyl nitroxide radicals as ligands, three novel complexes [Zn(hfac)2(NIToPh3Py)]2 (1), [Zn(hfac)2(NITmPh3Py)]2 (2), and {[Zn(hfac)2]3[(NITmPh3Py)]2}n (3) (where NIToPh3Py is 2-[2-methoxyphenyl(3-pyridinyl)]-4,4,5,5 -tetramethyl-imidazoline1-oxyl-3-oxide; NITmPh3Py is 2-[3-methoxyphenyl(3-pyridinyl)]-4,4,5,5-tetramethyl-imidazoline1-oxyl-3-oxide; hfac is hexafluoroacetylacetonate) have been obtained by the reactions of Zn(hfac)2⋅2H2O with NIToPh3Py/NITmPh3Py in n-heptane upon adjusting the experimental conditions. Their crystal structures and magnetic properties have been studied. X-ray crystal diffraction studies have revealed that complexes 1 and 2 display binuclear cyclic structure, while 3 presents a ring-chain polymer consisting of cyclic [Zn-Radical]2 dimers connected by Zn(hfac)2 units. The magnetic behaviors of the complexes 1–3 have been investigated and discussed in connection with their crystal structures.

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Funding

This work was found by National Nature Science Foundation of China (nos. 21071006 and 21771111).

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Authors and Affiliations

  1. College of Ecology and Environment, College of Chemistry, Zhengzhou University, 450001, Zhengzhou, Henan, China

    Meng-Ke Bai, **-Ke Ma & **g Chen

  2. College of Chemistry and Chemical Engineering, Anyang Normal University, 455000, Anyang, Henan, China

    **g Chen & You-Juan Zhang

  3. College of Chemistry, Nankai University, 300071, Tian**, China

    Qing-Lun Wang

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  1. Meng-Ke Bai
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Correspondence to **g Chen.

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Supplementary Information

Supporting information includes X-ray diffraction powder diffraction data for compounds 1–3 (Figs. S1–S3).

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Meng-Ke Bai, Ma, JK., Chen, J. et al. Three Novel Cyclic Zn(II)–Nitronyl Nitroxide Radical Complexes: Synthesis, Crystal Structures, and Properties. Russ. J. Inorg. Chem. (2024). https://doi.org/10.1134/S0036023624600588

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