TRIAZOLES AS COMPLEXING AGENTS - SYNTHESIS AND STRUCTURAL STUDIES OF SOME BIVALENT-METAL ION COMPLEXES WITH BIDENTATE AND TRIDENTATE LIGANDS

Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) complexes of 4-amino-5-merca pto-3-trifluoromethyl-s-triazole (AMTT) and o-4-salicylideneamino-3-tr ifluoromethyl-s-triazole (MSTT) have been synthesized and characterize d on the basis of elemental analyses, magnetic measurements, infrared and electronic spectral data. The ligands AMTT and MSTT were character ized by elemental analyses, infrared and H-1 NMR spectral studies. AMT T, involving N and S as donor atoms, and MSTT, involving N, O and S as donor atoms, act as bi- and tridentate ligands, respectively. The geo metry of the complexes has been assigned on the basis of magnetic and electronic spectral data. EPR parameters for copper (II) complexes hav e been calculated. Thermal stabilities of the complexes are also repor ted. Due to insolubility in water and common organic solvents and infu sibility at higher temperatures, all the complexes are thought to be p olymeric in nature.