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Pyrazine -2,3,5,6 - tetracarboxylic acid synthesis and its synthesis and characterization of complexes

Author: ShenZuo
Tutor: ZhangWeiPing
School: Northwestern University
Course: Inorganic Chemistry
Keywords: late transition metal catalyst for olefin polymerization pyrazine complexe
CLC: O621.2
Type: Master's thesis
Year: 2011
Downloads: 53
Quote: 0
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Abstract


In this thesis, a new type of catalytic performance with better post-transition metal polyolefin catalyst, the catalyst is a new series of post-transition metal double Brookhart-type polyolefin catalysts based on imine pyridine ligands were modified by obtained. This article directly to the pyridine ring replaced pyrazine ring.Through the optimization of synthesis of the literature, have a simple synthetic approach to 2,3,5,6-tetramethyl pyrazine was synthesized pyrazine-2,3,5,6-tetracaboxylic acid and Pyrazine-2,3,5,6-tetracarboxylic acid ester, these two compounds by elemental analysis, IR, UV spectroscopy characterization. The synthesis of the literature and were optimized by a simple synthetic method. Through the pyrazine-2.3.5.6-tetracarboxylate ammonolysis reaction, and a amide compound, pyrazine-2,3,5,6-tetraamide. And the compounds by elemental analysis and infrared spectroscopy, and the ester aminolysis reaction mechanism discussed.The literature on the pyrazine-2,3,5.6-tetracaboxylic acid complexes have been many studies reported in this paper by hydrothermal method to pyrazine-2,3,5,6-tetracaboxylic acid as ligand was synthesized [M (ptcH2)2(H2O2)] (M= Ni, Zn, Pb, Cu) complexes of four metals; and by changing the reaction conditions change, adjust the pH, adding a neutral small molecule ligands, changing the reaction temperature, synthesis of the complex [M2(pztc) (phen)2(H2O)2·4H2O] (M= Ni, Zn). Of these six kinds of complexes by elemental analysis, infrared spectroscopy, X-ray powder diffraction, TG-DSC and other analysis.

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