Triazole-bridged magnetic M(II) assemblies (M = Co,Ni) capped with the end-on terephthalate dianion involving multi-intermolecular contacts |
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Authors: | Houng Sik Yoo Jeong Hak Lim Jun Sung Kang Eui Kwan Koh Chang Seop Hong |
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Institution: | 1. Department of Chemistry, Korea University, Seoul 136-701, Republic of Korea;2. Nano-Bio System Research Team, Korea Basic Science Institute, Seoul 136-713, Republic of Korea |
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Abstract: | Two dimeric complexes M2(atrz)3(H2O)4(tp)2] · 11H2O M = Co(1 · 11H2O), Ni(2 · 11H2O); tp = terephthalate, atrz = 4-aminotriazole] were constructed from triply-bridged triazole ligands and terminal tp groups. Interestingly tp behaves as a capping group in an end-on fashion, which is a rare example for tp-related systems. Among the dinuclear assemblies, three types of intermolecular interactions (hydrogen bond, face-to-face π–π and edge-to-face CH–π contacts) as well as intramolecular hydrogen bonding are observed, eventually leading to the formation of a 3D network. Magnetic data show that moderate antiferromagnetic interactions between the two metal centers communicate through triazole groups, and non-negligible interdimer antiferromagnetic couplings are also involved in this system. |
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Keywords: | Copper Nickel Crystal structures Triazole ligand Magnetic properties |
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