Synthesis, crystal structure, and magnetic properties of oxime-bridged polynuclear Ni(II) and Cu(II) complexes |
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Authors: | Jiang Yun-Bo Kou Hui-Zhong Wang Ru-Ji Cui Ai-Li Ribas Joan |
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Institution: | Department of Chemistry, Tsinghua University, Beijing 100084, PR China. |
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Abstract: | Two new polynuclear complexes Ni6(amox)6(mu6-O)(mu3-OH)2](Cl2).6H2O and Cu3(amox)3(mu3-OH)(mu3-Cl)](ClO4).4H2O (amox- = anion of 4-amino-4-methyl-2-pentanone oxime) have been synthesized and characterized structurally and magnetically. The Ni(II) complex contains a novel Chinese-lantern-like Ni6 cage centered by an oxo ion. It contains the nearest octahedral Ni(II)...Ni(II) separation (<2.8 A) and exhibits strong antiferromagnetic properties. The Cu(II) complex has a cyclic trinuclear copper(II) core bridged by both mu3-OH(-) and mu3-Cl(-) ions. The magnetic susceptibilities of both antiferromagnetic complexes were fitted by using approximate models. |
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