Synthesis And Structural Characterization Of New2,6-bis(1,2,4-diazaphospholyl)Pyrazine And Copper And Zinc Complexes

In organometallic chemistry, aromatic five-memberedheterocyclic system of metal complexes is the research hot spot,especially containing N or P atoms and both heterocycliccompounds. Five-membered heterocyclic to protonation of anionicligand and metal cations in theory can be a variety of metal organiccoordination model complexes, the synthesis of metal complexesare widely used in organic catalysis, medicine synthesis, newsynthetic materials and so on. Over the years, according to theseheterocyclic compounds and inorganic salt of metal complexes withvarious metal and its metal organic compound structure, study itscoordination way, structure characteristic, form and application ofbonding has been a focus of hot spots.This paper reported the1,2,4-diazaphosphonic heterocyclic ligands as basic raw materials,design and synthesis of a new type of phosphine complex pyrazole derivative and its metal coordination compounds.And the structurecharacteristics, physical and chemical properties were studied.Usthe following details:1. Synthesis and characterization of2-chloro-6-(1,2,4-diazaphosphol)pyrazineWill be1,2,4-diazaphosphine ligands as synthetic raw materials,preparation of potassium as precursor, using the method of saltremoving in diethylene glycol dimethyl ether, add2,6-dichloropyrazine, accurate according to the mole ratio of1:1reaction,reaction generated2-chloro-6-(1,2,4-diazaphosphol) pyrazineligands.To study the synthetic method, the generated is asymmetricstructure, there is also a product of chlorine atom substituent canbe replaced by other ligands, lay a solid foundation for broadeningthe ligand.Product by melting point determination, IR spectrometer(IR), nuclear magnetic resonance (NMR), X-ray single crystaldiffraction analysis method were characterized.2. Synthesis and characterization of2,6-di(1,2,4-diazaphosphol)pyrazineUsing1,2,4-diazaphosphine ligands as basic raw materials,preparation of potassium as precursor, using the method of saltremoving in diethylene glycol dimethyl ether, add2,6-dichloropyrazine, accurate according to the mole ratio of2:1reaction, synthesis of2,6-di(1,2,4-diazaphosphol) pyrazine new ligands,research the synthesis method, the product is completelysymmetrical structure, the product by melting point determination,IR spectrometer (IR), nuclear magnetic (NMR), X-Ray single crystaldiffraction (XRD) analysis method were characterized.3.2,6-di(1,2,4-diazaphosphol)pyrazine new ligands to copper,zinc complexes synthesisThe new synthesis of2,6-di(1,2,4-diazaphosphol) pyrazine newligands, and Cu(ClO4)2·6H2O, Zn(ClO4)2·6H2O, CuCl2·2H2O inacetonitrile reaction, such as mole ratio of1:1and2:1reaction, theproduct of the reaction of single crystal, so far with Cu(ClO4)2·6H2Oreaction molar ratio is1:1got the single crystal structure, singlecrystal is trying to cultivate other compounds.By melting pointdetermination, IR spectrometer (IR), nuclear magnetic resonance(NMR), electron paramagnetic resonance (EPR), X-Ray singlecrystal diffraction (XRD), magnetism and so on were characterized.