4.3.3 Synthesis, Structure and Thermogravimetric Analysis of Two Ni(II) Complexes Based on Pyridine-2,4,6- tricarboxylic Acid


 Bei-Ling Liao(a9,Wei Sheng-Lu(a), Feng Yan-An(a), Xiu-Ju Yin(a),Shi-Xiong Li(a,b)*

a College of Chemistry and Biological Engineering, Hechi University, Yizhou 546300, China.

bSchool of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.

Address correspondence to Shi-Xiong Li, School of Environment and Energy, South China University of Technology. E-mail: lsxscut@1633.com

Received: August 24, 2016; accepted: November 09, 2016

ABSTRACT: Two new Ni(II) complexes based on pyridine-2,4,6-tricarboxylic acid, [Ni(Hpyta)(H2O)2(NM-3Py)].4H2O (1) and [Ni3(pyta)2(H2O)8].4H2O (2) (H3pyta = pyridine-2,4,6-tricarboxylic acid; NM-3py = N-methyl-3-pyridinamine) were synthesized by hydrothermal methods. The complexes were characterized by elemental analysis, IR spectrum and single-crystal X-ray diffraction. Complex 1 crystallizes in the triclinic system and belongs to P-1 space group, with crystallographic data a = 7.13408(8) Å, b = 11.0133(16) Å, c = 13.6180 (18) Å, α = 66.585(13)º, β = 76.670(11)º , γ = 88.186(10)º, V = 977.3(3) Å3; complex 2 crystallizes in the monoclinic crystal system and belongs to P21/c space group, with crystallographic data a=0.71356(16) Å, b=1.8574(4) Å, c=1.0761 (2) Å, α=90 º, β=103.225(3) º , γ=90 º, V=1388.3(5) Å3. TGA curves show that these complexes first removes water molecules and then the ligand, the remained residue being NiO.

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