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Synthesis and Magnetic Characterization of Mononuclear Co(Ⅱ) Complex Based on Pyrazine-Containing Hydrazone Schiff Base Ligand |
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Abstract: A mononuclear Co(Ⅱ)complex (NHEt3)[Co(HL)2] ·3H2O (1) based on a pyrazine-containing hydrazone Schiff base ligand H2L was synthesized and characterized by IR, thermogravimetric analysis, X-ray single diffraction and magnetic susceptibility measurements. X-ray single crystal analysis reveals that it consists of a Co(Ⅱ)ion, two deprotonated HL- ligands, three uncoordinated H2O and a protonated triethylamine. The central Co(Ⅱ)ion is six- coordinated with N2O4 donor sets to form distorted octahedral geometry. Magnetic susceptibility measurement of both complex 1 and the dehydrated 1 showed a gradual high spin to low spin transition, and the differences can be attributed to the hydrogen bonding effects on the magnetic properties. |
Keywords: hydrazone ligand single crystal structure spin transition mononuclear Co complex |
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CHEN Yu,WANG Zhao-Dong.Synthesis and Magnetic Characterization of Mononuclear Co(Ⅱ) Complex Based on Pyrazine-Containing Hydrazone Schiff Base Ligand[J].Chinese Journal of Inorganic Chemistry,2021,37(3):525-530. |
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