Syntheses,Crystal Structures,and Magnetic Properties of Three Metal‐Nitroxide Complexes with the V‐shaped 4, 4′‐Oxybis(benzoate) |
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| Authors: | Yi‐Wen Chen Hong‐Dao Li Dong‐Zhao Gao Xiu‐Guang Wang Zhong‐Yi Liu Ya‐Qiu Sun Guo‐Ying Zhang Yan‐Yan Xu |
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| Institution: | Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic‐Organic Hybrid Functional Material Chemistry, Ministry of Education, College of Chemistry, Tianjin Normal University, Tianjin 300387, P. R. China |
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| Abstract: | Three new metal–nitroxide complexes {Ni(NIT4Py)2(obb)(H2O)2] · 1.5H2O}n ( 1 ), {Co(NIT4Py)2(obb)(H2O)2] · 2H2O}n ( 2 ), and Co(IM4Py)2(obb)2(H2O)2]Co(IM4Py)2(H2O)4] · 10H2O ( 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(H2O)2]2– anions and Co(IM4Py)2(H2O)4]2+ ions. Magnetic measurements show that complexes 1 and 2 both exhibit weak antiferromagnetic interactions between the metal ions and the nitroxides. |
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| Keywords: | Nickel Cobalt Nitroxide radicals 4 4′ ‐Oxybis(benzoate) Magnetic properties |
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