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    STUDIA CHEMIA - Issue no. 1-2 / 2002  
         
  Article:   SYNTHESIS AND STRUCTURAL STUDIES OF SOME METAL COORDINATION COMPOUNDS WITH [1,2,4]-TRIAZOLE DERIVATIVE AS LIGAND.

Authors:  LETIŢIA OPREAN, L. DAVID, V. ZAHARIA, A. COMŞA, RADU OPREAN. 		 
       
         
  Abstract:  In this paper we report the synthesis and characterization of Co(II), Ni(II), Cu(II), Zn(II) complexes with ethyl-α-[(3-phenyl-[1,2,4]-triazol-5-yl)-thio]-acetoacetate as ligand (L). We have initiated studies of the behavior as ligand of named triazole derivative in methanol and dimethylformamide solutions in different metal-ligand molar ratio. Characterization of all complexes was accomplished by elemental analysis, IR, UV-Vis, ESR spectral studies and magnetic measurements. Correlations of the results obtained from physico-chemical investigations afford the assignment of the most probable structural formulae for the metal complexes. The new complexes are of the type [ML2(CH3COO)2], where M = Co(II), Ni(II) or [CuL(CH3COO)2] and [ZnLNH3]. The triazole derivative act as bidentate or tridentate ligand, the Co(II) and Ni(II) complexes have a octahedral geometry and the Cu(II) and Zn(II) complexes have a distorted tetrahedral local symmetry around the metals ions.  
         
     
         
         
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