Construction Of Complexes Based On A Novel Heterocyclic Thiones Ligand

In this thesis, a novel building block trithiocyanuric acid (ttcH3) is employed, toassemble with different metal ions, which affords a series of new coordination compounds:[Zn(ttcH2)2(3-bpt)2·2H2O](1),[Cd(ttcH2)2(3-bpt)2·2H2O](2),[Mn(ttcH2)2(3-bpt)2·2H2O](3),{[Zn2(ttcH2)4(bpy)3]bpy}n(4) and {[Mn2(ttcH2)4(bpy)3]bpy}n(5).(3-bpt=4-amino-3,5-bis(3-pyridyl)-1,2,4-triazole, bpy=4,4'-bipyridine) These complexeshave been characterized by elemental analyses (EA), infrared spectra (IR),thermogravimetric analysis (TGA), X-ray single crystal dirffaetion (PXRD).Single-crystal X-ray diffraction reveals that complexes1-3are mononuclear andcrystalize in the triclinic space group P-1, the co-ligand3-bpt in1-3show the unidentatecoordination mode,4-5show1D chain polymer and crystalize in the monoclinic spacegroup C2/c, bpy in4-5display the bidentate-bridging coordination mode. Complexes4and5display1-D chain structure, which mainly attribute to the bpy ligand, exhibiting theinterpenetrating structure.Thiocyanuric monovalent anions ttcH2-adopts the same bidentate chelatingcoordination mode existing in thione form. ttcH2-affording S and N assembled to metalions, in addition, the different auxiliary ligands affording two N, The central metal ions issix-coordinated defining octahedron geometry. In addition, higher-dimensional extendednetworks are formed with the aid of additional secondary interactions such as H-bondinginteractions in complexes1-5.In the course of the experiment, we change the stoichiometric ratios or thecounterions, the complexes showing the same coordination mode. It is conjectured that theligand is stable, the metal ions can not influence the structure of coordination polymer.