One-to-one mixtures of Co(hfpip and hfnip)2; hfpip = 1,1,1,5,5,5-hexafluoro-4-(phenylimino)-2-pentanonato and hfnip = 1,1,1,5,5,5-hexafluoro-4-(1-naphthylimino)-2-pentanonato, and 1,3-phenylenebis(4-pyridyldiazomethane), D2py2, gave diazo-cobalt complexes, 1 and 2, respectively, formulated by [Co(hfpip and hfnip) 2(D2py2)]n. Complex 2 was obtained as a single crystal and was found to have a zig-zag chain structure in the cis coordination of pyridines in D2py2 to the cobalt ions by X-ray crystallography. After irradiation of microcrystalline samples of 1 and 2, the generated carbene-cobalt complexes, 1c and 2c, showed magnetic properties due to ferromagnetic chains. Those complexes exhibited slow magnetic relaxations with Ueff/kB = 109 and 129 K and temperature-dependent hysteresis loops with Hc = 11 and 9 kOe at 1.9 K for 1c and 2c, respectively.
All Science Journal Classification (ASJC) codes
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry