Publication Date:
2013-03-06
Description:
Three new metal–nitroxide complexes {[Ni(NIT4Py) 2 (obb)(H 2 O) 2 ] · 1.5H 2 O} n ( 1 ), {[Co(NIT4Py) 2 (obb)(H 2 O) 2 ] · 2H 2 O} n ( 2 ), and [Co(IM4Py) 2 (obb) 2 (H 2 O) 2 ][Co(IM4Py) 2 (H 2 O) 4 ] · 10H 2 O ( 3 ) with the V-shaped 4, 4′-oxybis(benzoate) [NIT4Py = 2-(4′-pyridyl)-4, 4, 5, 5-tetramethylimidazoline-1-oxyl-3-oxide, IM4Py = 2-(4′-pyridyl)-4, 4, 5, 5-tetramethylimidazoline-1-oxide, and obb = 4, 4′-oxybis(benzoate) anion] were synthesized and structurally characterized. Single-crystal X-ray analyses indicate that complexes 1 and 2 crystallize in neutral one-dimensional (1D) zigzag chains, in which the nitroxide–metal–nitroxide units are linked by the V-shaped 4, 4′-oxybis(benzoate) anions, whereas complex 3 consists of isolated mononuclear [Co(IM4Py) 2 (obb) 2 (H 2 O) 2 ] 2– anions and [Co(IM4Py) 2 (H 2 O) 4 ] 2+ ions. Magnetic measurements show that complexes 1 and 2 both exhibit weak antiferromagnetic interactions between the metal ions and the nitroxides.
Print ISSN:
0044-2313
Electronic ISSN:
1521-3749
Topics:
Chemistry and Pharmacology
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