Citation: WANG Lei, CHENG Hui-Min, SU Fan, SHEN Xuan, ZHU Dun-Ru*. A Dicobalt(Ⅲ) Complex Containing Triple Helical N-N Bridges：Synthesis, Structure and Property[J]. Chinese Journal of Inorganic Chemistry, ;2014, 30(1): 163-168. doi: 10.11862/CJIC.2014.067 shu

A Dicobalt(Ⅲ) Complex Containing Triple Helical N-N Bridges：Synthesis, Structure and Property

1.
College of Chemistry and Chemical Engineering, State Key Laboratory of Materials-oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China

Received Date: 6 October 2013
Available Online: 1 November 2013
Fund Project:

Anew dinuclear cobalt(Ⅲ) complex, [Co₂L₃]·8H₂O (1), (H₂L=N，N'-bis(2-picolinoyl)hydrazine), was synthesized by a hydrothermal method and characterized by UV, FT-IR, ESI-MS, TGA, EA and single crystal X-ray crystallography. The complex crystallizes in trigonal system with space group R3c, a=1.63640(11) nm, α=48.52°, V=2.2556(3) nm³, Z=2, and final R=0.062. Each Co(Ⅲ) has an octahedral [CoN₆] core. Each L^2- ligand binds simultaneously to two Co(Ⅲ) cations in a bis(N，N')-bridging coordination mode with a Co…Co distance of 0.3497(2) nm. The hydrogen bonding interactions between carbonyl group and pyridyl ring link the molecules of 1 into a 1D chain which was further connected by the lattice water to form a 3D supramolecular framework. The TG analysis shows that 1 loses lattice water at 90 ℃ and is stable below 500 ℃. Magnetic measurement reveals that 1 is a low-spin species in the range of 1.8~375 K.
- dinuclear Co(Ⅲ) complex;crystal structure;low spin;N-N bridge,
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沈阳化工大学材料科学与工程学院沈阳 110142