Synthesis, Structure And Properties Of Some New Complexes Based On4-amino Phthalic Acid And Bipyridine Tetrazolium

In this paper, we successfully reported two kinds of complexes by implementingsolvothermal synthesis among transition metals (ZnⅡ，CdⅡ，FeⅡ，NiⅡ，CoⅡ, MnⅡ)with twokinds of ligands6-(pyridin-2-yl)picolinonitrile and4-aminophthalic acid respectively. All thecomplexes have been characterized by single-crystal X-ray diffraction﹑infrared spectra﹑elemental analysis and powder X-ray diffraction analysis.In the paper, we summarized the research progress, structures and properties ofamino-carboxylic acid complexes and tetrazole complexes, as well as a brief recommend tothe significance of research work.We obtained two new six-coordinated tetrazole complexes [Zn(PTP)2·H2O]n(1),[Cd(PTP)2·H2O]n(2)(PTP=2-(pyridin-2-yl)-6-(1H-tetrazol-5-yl) pyridine) via in situcycloaddition reaction between Zn(ClO4)2·6H2O, Cd(ClO4)2·6H2O and6-(pyridin-2-yl)picolinonitrile under hydrothermal conditions. single-crystal X-raydiffraction shows that the two complexes crystallized in different space groups with similarcoordination mode and coordination environment. The mononuclear molecules wereconnected to2D structures by H-bonds between water and tetrazole molecules.Three six-coordinated transition metal-tetrazole complexes were synthesized through insitu cycloaddition reaction among6-(pyridin-2-yl)picolinonitrile, NaN3and Fe(ClO4)3·6H2O,(or NiCl2·6H2O, CoCl2·6H2O) on the hydrothermal conditions. single-crystal X-ray diffractionshow the three complexes are of similar crystal structures.We got two novel three dimensional amino-carboxylic acid complexes[Co(4-APa)(H2O)]n(6) and [Ni(4-APa)(H2O)]n(7)(4-APa=4-aminophthalic acid) byimplementing solvothermal reactions between4-aminophthalic acid and CoSO4·7H2O,Ni(ClO4)2·6H2O on different temperatures respectively. The two complexes’ center metalswere both adopted six-coordinated model and octahedral structure which connect by the Nand O atoms from amino and carboxyl groups.Using4-aminophthalic acid and Zn(ClO4)2·6H2O、MnSO4·H2O as reaction substance,weobtained two three dimensional complexes:[Zn2(4-APa)2·H2O](8),[Mn(4-APa)(H2O)]n(9)under different hydrothermal conditions. Single-crystal X-ray diffraction shows bothcomplexes were six-coordinated, however, the two complexes posses different structures dueto their different coordination modes in4-APa ligand.