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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4.3.2. Recent advances in the chemistry of 1,1’-bis(ortho-carborane)


Igor B. Sivaev

A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, Russia

Corresponding author e-mail: sivaev@ineos.ac.ru

Received: October 01, 2016; accepted: October 26, 2016

Abstract. The chemistry of 1,1’-bis(ortho-carborane) has rapidly developed in recent years since a convenient method was reported for its synthesis. Here we review the recent progress in this field with main emphasis on the synthesis of 1,1’-bis(carborane)- based heterocycles and transition metal complexes as well as metallacarboranes.


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Citing articles:

  1. Spokoyny, A., Axtell, J. C., Kirlikovali, K. O., Dziedzic, R. M., Gembicky, M. and Rheingold, A. L. (), Magnesium Reagents Featuring a 1,1′-Bis(o-Carborane) Ligand Platform. Eur. J. Inorg. Chem. doi:10.1002/ejic.201700604

4.3.1 Self-assembly of two New Zinc coordination Polymers Based on N-[(3-Pyridine)-sulfonyl]amino Acid: Structure and Fluorescence


Pei Luo1, Shi-Xiong Li1, 2, Yi-Min Jiang1*

1 College of Chemistry and Pharmacy, Guangxi Normal University, Guilin, 541004, P.R. China

2College of Environment and Energy, South China University of Technology, Guangzhou, 510006, P. R. China

Address correspondence to Yi-Min Jiang, College of Chemistry and Pharmacy, Guangxi Normal University.

Corresponding author e-mail: 790223684@qq.com

Received: May 13, 2016; accepted: July 11, 2016

Abstract:  Two new zinc coordination polymers based on N-[(3-Pyridine)-sulfonyl]amino acid ligand have been synthesized and characterized by single-crystal X-ray diffraction and elemental analysis. The results show that the 1 is a two-dimensional structure coordination polymer and synthesized under room temperature condition; the 2 is a three-dimensional structure coordination polymer and synthesized under hydrothermal synthesis condition. These two structures are formed by 4,4′-dipyridy and 4,4′-azpy for 1 and 2, respectively. A structural comparison of these two coordination polymers suggests that different reaction temperatures play important role in the construction of resulting architectures of 1 and 2. Fluorescence measurements show that 1 has medium fluorescent emission at 374 nm and 2 has medium fluorescent emission at 438 nm.

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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: laijintian@163.com

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.

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4.1.1. Synthesis, crystal and molecular structure of manganese (II) complex of  2-acetylpyridine N (4) ethylthiosemicarbazone



1Felicite Majoumo-Mbe, 1Dieudonne T. Nde, 1Irene N. Mukoko and 2Offiong E. Offiong, 1Emmanuel N. Nfor*

1Department of Chemistry, Faculty of Science, University of Buea, PO Box 63 Buea, Cameroon. 2Department of Pure & Applied Chemistry, University of Calabar, PO Box 1115 Calabar, CRS, Nigeria.

Corresponding Author*: nforemman@gmail.com

Received: December 14, 2015; accepted: February 05, 2016


A novel Mn(II) complex with thiosemicarbazone derived from 2-acetylpyridine and N(4)-ethylthiosemicarbazide has been prepared. The single-crystal X-ray analysis of the Mn(II) complex showed a distorted octahedral MnN4S2 environment with the ligand chelating via the nitrogen and sulfur donor atoms in a tridentate manner. The triclinic form of the ligand which has crystallized in a monoclinic system in other works is also described. The basicity of nitrogen atoms of the ligand was tested with its reaction with HNO3 and the structure of the salt obtained is reported. The result shows that the lone pair of the pyridine nitrogen is more available due to the delocalization of other nitrogen lone pair of electron.

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