Аннотация
New nitronyl nitroxides, namely, 2-(4,5-dimethylimidazol-2-yl)-and 2-(4,5-dichloroimidazol-2-yl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-3-oxide-1-oxyl, were prepared in crystalline form. According to single-crystal X-ray data, intra-and intermolecular hydrogen bonds are formed between NH groups of the imidazole cycles and O atoms of the nitroxide moieties. The intermolecular H-bonds contribute to the alignment of molecules into chains along the a-axis; this alignment causes short intrachain contacts between O and C atoms carrying spin density of opposite signs. Such an arrangement of nitroxides induces ferromagnetic intrachain interactions (J ≈ 10 cm − 1 ) between neighboring radicals.
Язык оригинала | английский |
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Номер статьи | 219 |
Число страниц | 12 |
Журнал | Crystals |
Том | 9 |
Номер выпуска | 4 |
DOI | |
Состояние | Опубликовано - 1 апр 2019 |