The New Complexes Containing Pyrazine Pyrazole Aromatic Heterocyclic Ligands Synthesis And Structural Characterization

In this dissertation five novel coordination complexes have been designed and synthesized, and the five complexes include the two-dimensional Cd(II) coordination polymer [Cd₃(μ1,3-SCN)₆(μ-PP)₃]_n (1) (PP = 2-(Pyrazole-1-yl)-Pyrazine), in which thiocyanate and 2-(Pyrazole-1-yl)-Pyrazine as mixed bridge ligands ; one-dimensional Ag(I) coordination polymer [Ag(μ-PC)(μ-NO₃)]_n (2) (PC = 9-(pyrazin-2-yl)-9H-carbazole) with 9-(pyrazin-2-yl)-9H-carbazole and nitrate anion as mixed bridge ligands; binuclear Cu(II) complexes [Cu₂(μ-OOCCH₃)₄(PC)₂] (3) and [Cu₂(μ-OOCCH₃)₄(PL)₂] (4), in which acetate anion as bridge ligand and 9-(pyrazin-2-yl)-9H-carbazole as capped ligand for (3) and N,N-dimethylpyrazin-2-amine as capped ligand for (4); two-dimensional Ni(II) coordination polymer [Ni₃(μ₃-OH)(μ₂-CH₃COO)(μ'2-CH₃COO)(μ₂-Pla)₃(Pl)]n (5) (Pla = pyrazolate anion, PL = pyrazole), in which hydroxyl anion, pyrazolate anion and acetate anion as mixed bridge ligands and pyrazole as terminal ligand. The five complexes were characterized with infrared spectra and X?ray crystallographic analysis. The studies were made dealing with crystal structures of the five complexes, and especially for complex (5) due to its three types of bridge ligands and four kinds of bridging modes.The obtained result of complexes (1) and (5) will benefit to design and synthesis of novel complexes with mixed bridge ligands, and the structural data of (5) also benefit to the study of magnetic coupling dealing with the mixed bridge modes; complexes (3) and (4) will provide structural information how terminal ligands affect the magnetic coupling dealing with acetate bridging Cu(II) complexes; the results of complex (2) will give useful information for design and synthesis of novel Ag(I) complexes.