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Abstract
1-Methyl-5-mercapto-tetrazole (mmtz) reacts with Co(II) salts in the presence of N-containing ligands and three CoII/CoIII complexes, [CoII(mmtz)2(4,4′-bipy)(H2O)2]
n
(1), [CoIII(mmtz)2(1,10-phen)2]NO3 (2), and [(mmtz)2(2,2′-bipy)2(μ-OH)2]Cl2 (3), have been characterized using single-crystal X-ray diffraction structure determination, IR, and elemental analysis. Complex 1 has a 1-D polymeric structure with neutral [Co(mmtz)2(4,4′-bipy)(H2O)2] as repeating unit. These 1-D infinite chains are further connected into a 3-D supramolecular framework through intermolecular hydrogen bonds. In 2, mmtz is an S-bonding ligand to form a mononuclear structure. In 3, mmtz as a μ
2 bridging ligand links Co(III) ions to form a dimeric structure. Thermostability of 2 and 3 and electrochemical properties of 1–3 are discussed.
Acknowledgments
We gratefully acknowledge financial support from the National Nature Science Foundation of China (Nos 21061002, 21 101 035), Guangxi Natural Science Foundation of China (2010GXNSFF013001, 2011GXNSFC018009, and 0 832 098), and the Foundation of Key Laboratory of Medicinal Chemical Resources and Molecular Engineering, Guangxi Normal University, China (CMEMR2011-20).