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Synthesis, crystal structures and magnetic properties of a radical ligand and its corresponding copper(II) complex

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Abstract

A new chelating radical ligand, IMMeBzIm (IMMeBzIm = 2-{2′-[(l′-methyl)benzimidazolyl]}-4,4,5,5-tetramethylimidazoline-1-oxyl) and its copper(II) complex [Cu(IMMeBzIm)2(ClO4)]·(ClO4) have been prepared and characterized by IR, magnetic and single-crystal X-ray analysis. In the crystal structures, both free IMMeBzIm and the complex crystallize in monoclinic space groups P2(1)/c and C2/c, respectively. The structure of IMMeBzIm consists of mononuclear molecules. In the complex, the coordination geometry around copper is a distorted square pyramid, and the apical position is occupied by one oxygen atom of ClO4 − anion. A 1-D polymer is formed through intermolecular H-bond interactions. The variable-temperature magnetic susceptibility of the free IMMeBzIm suggests weak antiferromagnetic coupling with J = −1.12 cm−1 where the spin Hamitonian is defined as Ĥ = −2 JŜ 1 Ŝ 2 between radical and radical.

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Acknowledgments

This work was supported by the Natural Science Foundation of China (No. 20771054) and the Henan tackle key problem of science and technology (Nos. 072102270030).

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  1. College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyan, 471022, People’s Republic of China

    Yu-Fang Wang & Li-Ya Wang

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  1. Yu-Fang Wang
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  2. Li-Ya Wang
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Correspondence to Li-Ya Wang.

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Wang, YF., Wang, LY. Synthesis, crystal structures and magnetic properties of a radical ligand and its corresponding copper(II) complex. Transition Met Chem 35, 591–595 (2010). https://doi.org/10.1007/s11243-010-9368-8

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  • DOI: https://doi.org/10.1007/s11243-010-9368-8

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