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    STUDIA CHEMIA - Issue no. 4 / 2007  
         
  Article:   SPECTRAL INVESTIGATION OF 3-MERCAPTO-1,2,4-TRIAZOLE LIGANDS.

Authors:  MONICA M. VENTER, VALENTIN ZAHARIA. 		 
       
         
  Abstract:   Preliminary spectral studies on 5-aryl-3-mercapto-1,2,4-triazoles, Ar-C2H2N3S, Ar = C6H5- (1), 4-H3CC6H4- (2), 4-ClC6H4- (3) and 4-BrC6H4- (4) and 5,5’-(1,4-phenylen)-bis(3-mercapto-1,2,4-triazole), 1,4-C6H4(C2H2N3S)2 (5) are discussed. The FT-IR and 1H NMR spectra of 1-5 are consistent with the structure of triazole rings and aromatic systems. The IR data recorded for 1-5 and Raman data recorded for 5 confirm the occurrence of the thiol tautomeric form of the heterocycle in solid state. The 1H NMR data are consistent with the presence of the thioamido (thione) form in solution. All spectra suggest a mixture of thione/thiol tautomers in both solid state and solution.  
         
     
         
         
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