Реферат: New ionic polymeric compounds are synthesized by the reactions of alkali metal carbonates with 3,5-dinitro-2-pyridone (Hdnhp) in an aqueous-alcohol solution: [Li(dnhp)(H2O)]n (I), [Na(dnhp)(H2O)]n (II), [K(dnhp)(H2O)]n (III), and [K(dnhp)(Hdnhp)]n (IV). Their structures are determined by single-crystal X-ray diffraction analysis. Analysis of the structures of the synthesized compounds shows that an increase in the ionic radius of the alkali metal cation (Li−Na−K) results in a regular increase in the coordination number (5, 6, and 7/8, respectively) and a change in the polymeric architecture type: from one-dimensional polymeric chains in compounds I and II to framework structures in compounds III and IV. The stereochemically rigid 2-pyridonate ligand plays a key role in structure formation exhibiting a variable denticity and different coordination modes. Hydrogen bonds and π−π-stacking interactions provide an additional stabilization of the crystal packings in compounds I and II. The structures are compared with the earlier described rubidium and cesium polymers to trace the coordination behavior of the dnhp– anion in the alkali metal series.

Библиографическая ссылка: Nikiforova M.E. , Kiskin M.A. , Sidorov A.A. , Dalinger I.L. , Eremenko I.L.
Influence of the Ionic Radius of Alkali Metals on the Structures of Polymeric 3,5-Dinitro-2-pyridonates
Russian Journal of Coordination Chemistry. 2026. V.52. 5 :1-16. DOI: 10.1134/S1070328425601608

Даты:

Поступила в редакцию:	5 дек. 2025 г.
Принята к публикации:	1 февр. 2026 г.

Идентификаторы БД: Нет идентификаторов

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