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Metal complexes of niobium(V) with 3-substituted-4-amino-5-mercap- to-1,2,4-triazole Schiff bases have been synthesized in dry chloroform under a nitrogen atmosphere. They were characterized by elemental analysis, molar conductance, elec- tronic, infrared, 1 H-NMR spectroscopy and thermal studies. Parameters, such as energy of activation (Ea), enthalpy (H # ), entropy (S # ) and Gibbs energy (G # ), were com- puted from the thermal decomposition data. Based on the spectral and thermal studies, a coordination number of seven is proposed.

Thermo-kinetic and spectral studies of niobium(V) complexes with 3-substituted-4-amino-5-mercapto-1, 2, 4-triazole Schiff bases