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Int. J. Mol. Sci. 2013, 14(12), 23597-23613; doi:10.3390/ijms141223597

New Mononuclear Cu(II) Complexes and 1D Chains with 4-Amino-4H-1,2,4-triazole

1 Institute of Condensed Matter and Nanosciences, Université Catholique de Louvain, Molecules, Solids and Reactivity (IMCN/MOST), Place L. Pasteur, 1, Louvain-la-Neuve 1348, Belgium 2 Institute for Advanced Materials, Physicochemical Processes, Nanotechnology & Microsystems, NCSR Demokritos, Athens 15310, Greece
* Author to whom correspondence should be addressed.
Received: 17 September 2013 / Revised: 29 October 2013 / Accepted: 30 October 2013 / Published: 3 December 2013
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The crystal structures of two mononuclear Cu(II) NH2trz complexes [Cu(NH2trz)4(H2O)](AsF6)2 (I) and [Cu(NH2trz)4(H2O)](PF6)2 (II) as well as two coordination polymers [Cu(μ2-NH2trz)2Cl]Cl∙H2O (III) and [Cu(μ2-NH2trz)2Cl] (SiF6)0.5∙1.5H2O (IV) are presented. Cationic 1D chains with bridging bis-monodentate μ2-coordinated NH2trz and bridging μ2-coordinated chloride ligands are present in III and IV. In these coordination polymers, the Cu(II) ions are strongly antiferromagnetically coupled with J = −128.4 cm−1 for III and J = −143 cm−1 for IV (H = −JΣSiSi+1), due to the nature of the bridges between spin centers. Inter-chain interactions present in the crystal structures were taken into consideration, as well as g factors, which were determined experimentally, for the quantitative modeling of their magnetic properties.
Keywords: coordination polymers; copper; 1,2,4-triazole; magnetic properties; crystal engineering coordination polymers; copper; 1,2,4-triazole; magnetic properties; crystal engineering
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Dîrtu, M.M.; Boland, Y.; Gillard, D.; Tinant, B.; Robeyns, K.; Safin, D.A.; Devlin, E.; Sanakis, Y.; Garcia, Y. New Mononuclear Cu(II) Complexes and 1D Chains with 4-Amino-4H-1,2,4-triazole. Int. J. Mol. Sci. 2013, 14, 23597-23613.

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