Summary
A new binuclear NiII complex, [{(TPA)Ni(μ-Cl)}2]-(ClO4)2·H2O (1), where TPA = tris(2-pyridyl-methyl) amine, has been prepared and characterized. The X-ray crystal structure and variable temperature magnetic susceptibility (4–300 K) of the complex have been determined. The two NiII atoms of (1) are in a distorted octahedral environment and are bridged by Cl atoms. Ni-Cl distances are 2.363(6) and 2.503(7) Å, and the Ni-Cl-Ni angle is 92.7(2)°. The metal atoms are separated by a non-bonding distance of 3.523 Å.
The effective magnetic moment of (1) increases slightly with decreasing temperature and appears to reach a maximum before decreasing. The observed data were fitted to the Heisenberg model and the results indicate that there is a ferromagnetic interaction (positive J) and weak antiferromagnetic intermolecular interaction (negative θ).
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Zhang, Z.H., Bu, X.H., Zhu, Z.A. et al. Synthesis, magnetism and crystal structure of a chloride-bridged binuclear nickel(II) complex of tris(2-pyridylmethyl)amine. Transition Met Chem 21, 235–237 (1996). https://doi.org/10.1007/BF00165974
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DOI: https://doi.org/10.1007/BF00165974