Citation: Yu CHEN, Zhao-Dong WANG. 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. doi: 10.11862/CJIC.2021.050 shu

Synthesis and Magnetic Characterization of Mononuclear Co(Ⅱ) Complex Based on Pyrazine-Containing Hydrazone Schiff Base Ligand

Yu CHEN ,
Zhao-Dong WANG ^,

College of Chemistry and Environmental Engineering, Chongqing Key Laboratory of Environmental Materials & Remediation Technologies, Chongqing University of Arts and Sciences, Chongqing 402160, China

Corresponding author: Zhao-Dong WANG, ouwzdong@qq.com
Received Date: 10 August 2020
Revised Date: 16 November 2020

Figures(6)

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. CCDC: 1973542, 1 (298 K); 20274281, 1 (100 K).
- hydrazone ligand,
- single crystal structure,
- spin transition,
- mononuclear Co complex
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