Di-radical dinuclear copper complex: synthesis, structure, and magnetic properties

Abstract

The reaction of Cu(Ac)₂·4H₂O with 2-[(3,5-dichloro-2-hydroxy-benzylidene)-amino]-2hydroxymethyl-propane-1,3-diol (H₄L) and 4,4′-bipyridyl-N,N′-dioxide (4,4′-bipy-NO) in DMF under solvothermal conditions leads to the formation of a di-radical dinuclear copper complex [Cu₂(4,4′-bipy-NO)(dcdmap)₄] (1) (dcdmap is the anion of 2,4-dichloro-6dimethylaminomethyl-phenol, synthesized by an in situ reaction). Compound 1 was characterized by elemental analysis, IR spectroscopy, and X-ray single-crystal diffraction. Complex 1 displays dominant anti-ferromagnetic interaction between oxyradicals and copper ion and oxyradical.

Keywords:

• Radical ligand
• Crystal structure
• Magnetic properties

Acknowledgements

This work was financially supported by the National Nature Science Foundation of China (No. 21161,006), the Nature Science Foundation of Guangxi Province of China (No. 2010GXNSFA013014), Program for Excellent Talents in Guangxi Higher Education Institutions (Gui Jiao Ren [2012]41), and Startup foundation for Dr Zhang of Guilin University of Technology.