Assembly of Imidazolyl-Substituted Nitronyl Nitroxides into Ferromagnetically Coupled Chains; Crystals; Vol. 9, iss. 4
| Parent link: | Crystals Vol. 9, iss. 4.— 2019.— [219, 12 p.] |
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| Συγγραφή απο Οργανισμό/Αρχή: | |
| Άλλοι συγγραφείς: | , , , , , , , , |
| Περίληψη: | Title screen New nitronyl nitroxides, namely, 2-(4,5-dimethylimidazol-2-yl)- and2-(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. |
| Γλώσσα: | Αγγλικά |
| Έκδοση: |
2019
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| Θέματα: | |
| Διαθέσιμο Online: | https://doi.org/10.3390/cryst9040219 |
| Μορφή: | Ηλεκτρονική πηγή Κεφάλαιο βιβλίου |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=660249 |
| Περίληψη: | Title screen New nitronyl nitroxides, namely, 2-(4,5-dimethylimidazol-2-yl)- and2-(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. |
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| DOI: | 10.3390/cryst9040219 |