Abstract
Crystalline Cs salts with the difurazanopyrazine radical anion are synthesized: Cs(L•)(H2O)2-I, Cs(L•)(H2O)2-II, Cs2(L•)2(HL•)(H2O), Cs3(L•)3(L••)2(H2O)3. In the solid phase, Cs ions are surrounded by water molecules and are located between the stacks of difurazanopyrazines, forming a framework. The study of the structure and magnetic properties of the compounds shows that Cs(L•)(H2O)2-I represents a metastable phase that transforms into Cs(L•)(H2O)2-II on cooling and differs from the initial compound by a shift of radical anions relative to each other in the stacks. It is found that in Cs(L•)(H2O)2-II there is strong antiferromagnetic exchange between paramagnetic centers.
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The work was supported by the grant of the Ministry of Science and Higher Education of the Russian Federation (Agreement with the Institute of Organic Chemistry, Russian Academy of Sciences 075-15-2020-803).
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Russian Text © The Author(s), 2022, published in Zhurnal Strukturnoi Khimii, 2022, Vol. 63, No. 10, 100166.https://doi.org/10.26902/JSC_id100166
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Ovcharenko, V.I., Fokin, S.V., Sheremetev, A.B. et al. CESIUM SALTS WITH THE DIFURAZANOPYRAZINE RADICAL ANION. J Struct Chem 63, 1697–1707 (2022). https://doi.org/10.1134/S0022476622100158
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DOI: https://doi.org/10.1134/S0022476622100158