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    STUDIA CHEMIA - Issue no. 2 (Tom I / 2010  
         
  Article:   SOLID STATE STRUCTURE OF A NEW NICKEL(II) (3H-2-THIOXO-1,3,4-THIADIAZOL-2-YL) THIOACETATO COMPLEX.

Authors:  MONICA M. VENTER, VASILE N. BERCEAN, RICHARD A. VARGA, VIOREL SASCA, TRAIAN PETRIŞOR JR., LELIA CIONTEA.
 
       
         
  Abstract:  

Reaction of the monosodium salt of (3H-2-thioxo-1,3,4-thiadiazol-2-yl)thioacetic acid, Na(C2HN2S3CH2COO)∙H2O (1) with NiSO4∙7H2O produced the corresponding nickel(II) complex, Ni(C2HN2S3CH2COO)2·nH2O where n = 4 (2) and 6 (3). The product was characterized by means of microanalysis and thermal analysis. The crystal structure of 3 was determined by single-crystal X-ray diffraction. The molecular structure consists of discrete molecular units: one octahedral [Ni(H2O)6]2+ cation and two organic anions, (C2HN2S3CH2COO). The supramolecular structure of 3 is discussed by comparison with that of 1 in its decahydrate, dinuclear form, [Na(C2HN2S3CH2COO)(H2O)4]2×2H2O (1’), and reveals the self-assembly of the ionic units into alternating columns through N-H∙∙∙O, O-H∙∙∙O/S and S∙∙∙S interactions.

 

Keywords: mercapto-1,3,4-thiadiazole derivatives; nickel(II) complex; thermal decomposition; crystal structure.

 
         
     
         
         
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