New Copper(ii) and Nickel(ii) Complexes with Bifunctional Tetrazolate-5-carboxylate Ligands: Syntheses, Crystal Structures, and Magnetic Properties

A-Qing Wu; Qi-Yong Chen; Mei-Feng Wu; Fa-Kun Zheng; Feng Chen; Guo-Cong Guo; Jin-Shun Huang

doi:10.1071/CH09009

RESEARCH ARTICLE

New Copper(ii) and Nickel(ii) Complexes with Bifunctional Tetrazolate-5-carboxylate Ligands: Syntheses, Crystal Structures, and Magnetic Properties

A-Qing Wu ^A ^B , Qi-Yong Chen ^A , Mei-Feng Wu ^A ^B , Fa-Kun Zheng ^A ^C , Feng Chen ^A ^B , Guo-Cong Guo ^A ^C and Jin-Shun Huang ^A

+ Author Affiliations

- Author Affiliations

^A State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, the Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.

^B Graduate School, the Chinese Academy of Sciences, Beijing 100039, China.

^C Corresponding authors. Email: zfk@fjirsm.ac.cn; gcguo@fjirsm.ac.cn

Australian Journal of Chemistry 62(12) 1622-1630 https://doi.org/10.1071/CH09009
Submitted: 7 January 2009 Accepted: 16 June 2009 Published: 10 December 2009

Abstract

Four new complexes with bifunctional tetrazolate-5-carboxylate ligands of 1H-tetrazole-5-formic acid (H₂tzf) and 1H-tetrazole-5-acetic acid (H₂tza), namely two dinuclear [M(tzf)(H₂O)₃]₂·2H₂O (M = Cu 1, Ni 2) and two mononuclear [Cu(tzf)(2,2′-bipy)₂]·5H₂O 3 and Cu(tza)(2,2′-bipy)H₂O 4, were prepared and structurally characterized by single-crystal X-ray diffraction. Two different coordination modes of tetrazolate-5-carboxylate ligands exist: a tridentate N,O-chelated-N-bridged mode in 1 and 2, and a bidentate N,O-chelated mode in 3 and 4, which was first observed for the tetrazolate-5-carboxylate complexes. Extensive hydrogen bonds play an important role in the construction of the supramolecular network. Variable-temperature magnetic susceptibility data show the presence of antiferromagnetic interactions in 1 and 2. The thermogravimetric analyses of complexes 1–4 are also discussed.

Acknowledgements

We gratefully acknowledge the financial support of the 973 Program (2006CB932900 and 2007CB936703), National Nature Science Foundation of China (20671091 and 20871115) and Fujian Province (A0420002).

References

New Copper(ii) and Nickel(ii) Complexes with Bifunctional Tetrazolate-5-carboxylate Ligands: Syntheses, Crystal Structures, and Magnetic Properties

Abstract

Acknowledgements

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