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Ferromagnetic intermolecular interaction and crystal structure of the p-pyridyl nitronyl nitroxide radical

✍ Scribed by Kunio Awaga; Tamotsu Inabe; Yusei Maruyama


Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
189 KB
Volume
190
Category
Article
ISSN
0009-2614

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✦ Synopsis


X-ray crystal analysis and magnetic measurements reveal the ferromagnetic linear chain with JF/kB=0.27 K in an a-nitronyl nitroxide, 2-(4-pyridyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-1 -oxyl 3-N-oxide.


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## Abstract The crystal structures and magnetic properties of the nitronyl nitroxide radicals 4,5‐dihydro‐4,4,5,5‐tetramethyl‐3‐oxido(1__H__‐imidazol‐1‐yloxyl) (**1**), 4,5‐dihydro‐2,4,4,5,5‐pentamethyl‐3‐oxido(1__H__‐imidazol‐1‐yloxyl) (**2**), 2‐(4‐chlorophenyl)‐4,5‐dihydro‐4,4,5,5‐tetramethyl‐3‐

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An a-nitronyl nitroxide cation radical, 2-( 3-N-methylpyridinium)-4,4,5,5-tetramethyl-4,5-dihydro-lH-imidazol-l-oxyl 3-Noxide, has been found to possess a unique structure and magnetic properties: the molecules are manifested as dimers with a very short intermolecular contact between the NO group an

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The crystal structure of a new phase of the pnitrophenyl nitronyl &oxide radical compound is described. A study of its magnetic properties reveals the largest intermolecular ferromagnetic coupling reported so far among a series of polymorphs of this compound.