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 оригиналаанглийский
Номер статьи219
Число страниц12
ЖурналCrystals
Том9
Номер выпуска4
DOI
СостояниеОпубликовано - 1 апр 2019

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