The ionic salts (p-rad)(2)[ReCl6] (1) and (m-rad)(2)[ReCl6] (2) (p/m-rad = 2-(4/3-N-methylpyridinium)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-1-oxyl-3-N-oxide) have been prepared and their crystal structures determined by single-crystal X-ray diffraction. The nitronyl nitroxide cations in compound 1 show a layered disposition, whereas the [ReCl6](2-) units are placed between these layers. The nitronyl nitroxide cations in compound 2 adopt an hexagonal array but they do not result in layers. Bulk magnetic properties of I and 2 have been investigated in the temperature range 2-300 K. Both compounds show weak but significant intermolecular antiferromagnetic interactions.
Hexachlororhenate(IV) Salts of Organic Radical Cations
ARMENTANO, Donatella;G. DE MUNNO;
2005-01-01
Abstract
The ionic salts (p-rad)(2)[ReCl6] (1) and (m-rad)(2)[ReCl6] (2) (p/m-rad = 2-(4/3-N-methylpyridinium)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-1-oxyl-3-N-oxide) have been prepared and their crystal structures determined by single-crystal X-ray diffraction. The nitronyl nitroxide cations in compound 1 show a layered disposition, whereas the [ReCl6](2-) units are placed between these layers. The nitronyl nitroxide cations in compound 2 adopt an hexagonal array but they do not result in layers. Bulk magnetic properties of I and 2 have been investigated in the temperature range 2-300 K. Both compounds show weak but significant intermolecular antiferromagnetic interactions.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
