Author Archives: Hugo Muñoz

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:

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.

(1.9 MiB, 146 downloads)

4.2.1. Synthesis, characterization and antibacterial activity of cyclohexyltin N-(salicylidene)valinates


Xiaowen Shi, Guochao Kong, Lin Liu, Hong Gao, Xue Gao, Laijin Tian*

Key Laboratory of Natural Products and Pharmaceutical Intermediates, Qufu Normal University, Qufu 273165, China.

* Corresponding author, e-mail:

Received: April 14, 2016; accepted: May 22, 2016

Abstract: Two new cyclohexyltin N-(salicylidene)valinates, [2-HOC6H4CH=NCH(CH(CH3)2)COO]SnCy3 (1) and [2-OC6H4CH=NCH(CH(CH3)2)COO]SnCy2 (2) (Cy = cyclohexyl), have been synthesized and characterized by elemental analysis, IR, and 1H NMR. The crystal structure of 2 has been determined by X-ray single crystal diffraction. In the complexes, the carboxylate is monodentate. Complex 1 is a four-coordinated tin compound, and 2 has a distorted trigonal bipyramidal geometry with the axial locations occupied by one carboxylate oxygen and a phenolic oxygen of the ligand. Bioassay results show that 1 and 2 have good in vitro antibacterial activity against Escherichia coli.

(1.4 MiB, 183 downloads)