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Syntheses, Crystal Structures, and Magnetic Properties of Three Metal‐Nitroxide Complexes with the V‐shaped 4, 4′‐Oxybis(benzoate)
Author(s) -
Chen YiWen,
Li HongDao,
Gao DongZhao,
Wang XiuGuang,
Liu ZhongYi,
Sun YaQiu,
Zhang GuoYing,
Xu YanYan
Publication year - 2013
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201300008
Subject(s) - antiferromagnetism , nitroxide mediated radical polymerization , chemistry , crystallography , metal , ion , oxide , metal ions in aqueous solution , crystal structure , stereochemistry , polymer , organic chemistry , physics , radical polymerization , copolymer , condensed matter physics
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.